Digitally Curious - A Vintage LCD Watch Blog

Digitally Curious - A Vintage LCD Watch Blog

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  • Monday, January 5th, 2009 - 4:00 pm
  • Casio TS-100 [815] World Time Thermometer

  • So after showing one from the 70's and one from the 80's, I thought it would be nice to show one from the 90's. (Well... It was introduced in 1989 but it was made well into the 90's!)

    The TS-100 World Time Thermometer with module 815.



    This is the watch that started it all for me. This watch is the reason I got into collecting and, by extension, the reason this site exists. in the early 90's, my dad bought me the Japanese version of this watch (the TS-150) at the Japanese international airport during a layover. I wore it with fondness for a decade, until I started to neglect it... and then lost it! I didn't think it would be hard to find when I started looking for it again, but soon realized that it was a "collector's item." Huh? How can it be a collectors item? People collect these??

    And the rest is... history.

    Anyway, back to the watch.

    This is a very popular watch, as I have frequently seen them sought in request/wanted topics on forums, and eBay sales almost always sell well with multiple bidders. I was very lucky to get this one for less than $50, because it's in very good condition with the lettering mostly intact. Finding a TS-100 with all its lettering intact is super rare, so if you ever find one jump on the chance.

    So what's the deal with this watch? I think it's popular because the feature list is virtually endless. It is a very capable watch with all the essentials, like 100M water resistance and microlight. But there is a looot more under the hood here. Just look at the dial, CHOCK FULL of information. I'll guide you through the basics.

    First of all, the "thermometer."



    This watch can display temp in °F and °C, while its Japanese-version only shows temp in °C. You can turn on its "wrist" feature to make the watch compensate for your body temperature. (The tiny wristwatch icon depicts this feature.) The feature works okay, just don't expect to measure temperature very accurately when you're wearing this watch on your skin or under your clothes. The watch will update the temp display every 2 minutes. If you want the temp display to read faster, here's a trick: turn the "wrist" mode on and off. This will force the watch to re-take its temp reading.

    There are many Casio watches with a built-in temperature sensor, but in my opinion the new ones are not designed as well as these vintage models. In modern Casio watches, the temp sensor is a small chip package mounted directly on the circuitboard. This makes the sensor measure the core temp of the watch. In the old watches, the temp sensor is mounted on lead wires and extend to the outer casing. In the case of this TS-100, the temp sensor lies directly under that silver colored circular thing in the middle. Yes, that volcanic thing actually serves a purpose!

    *A note on watch thermometers: The temp sensor on the TS-100 can not tolerate boiling water. Do not immerse this watch in boiling water, or subject it to extreme temperature conditions, like a match or something like that. I know it's tempting, but don't do it! Besides, according to the manual, the watch can only display temps between 14°F and 140°F. If the temp is outside that range, it will just show up as --°F


    Now for the "world time."



    Not only does the watch serve world time, it shows it on a MAP! I think that little green world map makes this watch very unique. There are a few Casio watches with world maps on its face, but none with this exact setup. And none of them have a built-in thermometer!



    As a "world time thermometer" watch, there is yet another feature that sets this world time mode unique. It displays the monthly average hi and low temperature of the destination city. Looks like Moscow is very cold this time of year. brrrr.

    And it records the temperature every hour, logging it for 24 hours. Why is this feature called "LOC?" My best guess is that LOC stands for local temperature. But I'm not sure.



    And it has an hourly signal and FIVE.. yes FIVE! daily alarms.



    Plus a 23:59:59 timer. The timer is unique as well; it allows you to set the timer in second increments, whereas most watches limits the smallest setting to 1 minute. This may be a minor advantage to some, but I am constantly timing things for 30 seconds and this watch makes it a snap.



    Plus stopwatch! The stopwatch display will show you the hours digit if you press the "adjust" button. Wow how many features is that?... I lost count!



    And I love these large round buttons. Mmm. buttons...



    And one last look at this beautiful, truly multi-functional watch.



    By the way, one odd thing about this watch is that uses a 17mm watch band. Most watches use 16/18/19/20 mm bands, so finding a replacement band for this watch is difficult. Very difficult. (As of this article, there are several available on eBay. Get them while you can!)

    Casio also made the TS-150, which is a Celsius-only version.

    *If you are looking for a modern watch with similar functionality, check out Casio's AQF-100 series watch. It's loaded with features!

  • Filed under: watch
  • Comments!
  • » I have the same watch which was bought in the US in 1994. Been using this for 15 years now. Its fantastic.
  • by: Ravi, submitted Monday, July 6th, 2009 - 11:41 am
  • » Hi there, I have one of these but it is currently minus a strap and has flat battery.. I'd love to get it sorted for use while surfing and maybe receational diving (only down to 30m max) but cannot find anywhere to get the battery fitted and back sealed on. Even just had it returned unrepaired by Casio UK due to it being 'too old'!

    Please help if you can!
  • by: Jamie, submitted Thursday, July 23rd, 2009 - 3:26 pm
  • » Hello Jamie,

    Contact me directly through the contact form and leave your email address, and I will contact you with details about fixing the TS-100
  • by: admin, submitted Thursday, July 23rd, 2009 - 3:29 pm
  • » I fitted mine with a strap from the origninal G-Shock...another killer watch that Casio designed. It came on the market, while I was at University...at the time, I could not afford it and then I forgot about it. Thanks to Ebay, I was reminded of the great original Gshock and bought it....but it is too thick for me...but my son loves it and now he wears it. I went back to my old TS-100...benn wearing it on and off since 1985...great features...but since Indiglo and Co conquered the market, the little light does seem a bit dim....nevertheless, the Gshock strap works great and you can get it at Wallmart for a few bucks as a replacement strap. Good Luck! Frank (Germany)
  • by: Frank, submitted Monday, August 3rd, 2009 - 2:15 pm
  • » got myself a genuine strap on eBay sent all the way from sunny LA to the UK - just need to find someone to fit a battery and seal the back on for water usage and i am one happy bunny!
  • by: Jamie, submitted Sunday, August 16th, 2009 - 4:01 pm
  • » I screwed up changing the battery on one of my ts-100. The mechanism unit popped out of its case. I know the small spring is inserted into the hole that is next to the battery at about 10 o'clock when looking at the back of the mechanism. But there is also a slightly longer spring that came off and I don't know where it belongs. And I can't get the screen to come on. Sometimes I get the light and sometimes I briefly get garbled images when I try reinserting the new battery. Is this unit salvageable?
  • by: Bobby White, submitted Thursday, September 17th, 2009 - 2:33 am
  • » I Got One Of These Off E-bay WITH The Writinh In Immaculate Condition....I Don't Wear It Cos It's So Good.....Just Nice To Keep
  • by: roy marshall, submitted Sunday, September 27th, 2009 - 12:01 pm
  • » Hi, thanks for showing this watch, I had one from 1993 to 1999 when I was assaulted, I really suffered from losing it since it was a gift from my father who died in 1993, and I know I would be using it today if possible. I feel like I've never seen any better watch than that one, I prefer that one from most modern digital watches, I really loved it and ejoyed using it. I've been looking for this watch for years since I didn't knew it's model name.

    I think that there are some things that are better to remember and I'm just happy from seeing the pics and knowing the model name, but I just wanted to know what you think about modern watches and if there is any new model that can be compared to it that is easier to find, maybe with world map, dot matrix, thermomether, several alarms... you know similar functions and maybe some more, a prove that technology is actually evolving.

    BTW I saw that AQF-100 but i'm thinking more of a fully digital.

    Sorry for any mistake on my writing my english is not perfect.
  • by: Guzz, submitted Wednesday, October 7th, 2009 - 10:47 am
  • » Hi,
    I have the same watch but it is branded TIMEX.
    It's a great watch. I bought it around 1985 in the US.
  • by: Zbouba, submitted Wednesday, February 3rd, 2010 - 2:45 pm
  • » I currently have a (815) TS-100 which the battery failed. I have tried to replace the battery (CR1620), but I can not seem to get it to show the display after replacing the battery. The new battery tests good, so that is not the problem. Any suggestions?

    I also have a (515) TS-1200 and a (215) TS-1000, which are much older models.
  • by: Dean Padrick, submitted Tuesday, February 9th, 2010 - 4:14 pm
  • » When you put in a NEW Battery - you MUST RESET the watch, there is a TINY hole labeled "AC" you need to touch that WHILE touching the battery back. use a paperclip and bend it so you can use both parts at the same time
  • by: James - vintage 90's, submitted Friday, March 19th, 2010 - 4:04 pm
  • » Hi,
    I have a TS-100 which hasn't failed me for over 15 years. Last month, however, I cracked the corner of the casing where the strap pin clips in. Majorly angered! Anyone got any ideas on a solution? I've been looking for a broken TS-100 so I can swap the internals, perhaps, but no luck so far. Be grateful if anyone has any suggestions. Cheers!
  • by: Pete Norman, submitted Monday, April 12th, 2010 - 5:26 pm
  • » DAMN GREAT watch, my dad used it for more than 10 years, and am using it now....
  • by: DAUD AZAM, submitted Sunday, May 9th, 2010 - 10:35 am
  • » Thanks for the Tip with the AC-Hole!!!

    I had the same Problem. I cant see anything in the Display after replace the Battery.
    In The Hole is a Reset Button. Short it with + of Battery, then it makes a Reset and the Watch restarts.
    MfG,
    thomas
  • by: Thomas (germany), submitted Sunday, May 16th, 2010 - 8:07 am
  • » I've had a Casio TS-100 since the late '80's. I have no idea how many I've purchased over the years, but I still have one and it still works great! I just put in a fresh CR1620 so I should be good for a few more years.
  • by: Bruce T, Austin TX, submitted Thursday, July 15th, 2010 - 4:30 pm
  • » I have had this watch since 1990, found it on a recent trip to parents house. Had the original band replaced and a new battery put in. Just curious if anyone knows how to change each locations time. I am based in PST and for the LAX showing, I am 3 hours off. Any help on syncing this ?
  • by: Charlie, submitted Saturday, July 24th, 2010 - 3:11 pm
  • » Have a TS-100 that at the 1:00pm time turns to 24hr
    I remember that it could be changed from regular time to 24hr it would have an icon showing it was set to 24hr ???
  • by: David Denner, submitted Friday, August 6th, 2010 - 4:21 pm
  • » Thanks for having this site. It is a very good watch, I was surprised to see how many other people agree. I also had trouble getting a replacement watch-band, and eventually took the band off, and still use it as my "pocket watch". I much prefer it, actually, to having a watch on my wrist. Very well designed thing. BTW your instructions here are very helpful - esp. the AC "reset" (which I had forgotten about)
  • by: Greg, submitted Monday, August 9th, 2010 - 1:31 pm
  • » Hi
    I can only say that this watch is a "time machine". I bought it in 1991 and wore it proudly till 2000. Unfortunately I tore the strap then and it has been laying as a thermometer ever since. Last week I had to use the stopwatch function and then just checked for more information about it in Internet. Happily I found a strap in USA's ebay and bought it immediately. I am eagerly waiting now to receive it an to wear this great piece of old school machinery.
    Chears,
    Todor
  • by: Todor (Germany), submitted Tuesday, August 24th, 2010 - 6:07 am
  • » I have the stop watch version of the 515TS 1200 and it is still brilliant since I got it in the early 90'a ( I think!)I change the battery every few years or so ( no problems) and the strap ( more often). Everything is still first rate. A brillinat watch.
  • by: Richard Tucker, submitted Wednesday, September 8th, 2010 - 2:47 am
  • » Hi! I´ve got a fabulous TS 1200 since 1988. When I was young it make me feel better than now with an iPhone.
  • by: Pablo, submitted Saturday, September 25th, 2010 - 4:54 am
  • » @Pete Norman
    Mine had the same problem, probably because of all the non original straps I used on it, but I took it to a store and they reconstructed the broken part, the look wasn't perfect but at least it worked.

    BTW I got an AQF-100 4335 after reading this and I'm pretty happy, maybe not as with the TS-100 but anyways...
  • by: Guzz, submitted Thursday, September 30th, 2010 - 5:48 pm
  • » I got a TS-100 in 1991 and it's still going strong 19 years later.
  • by: Wayne, submitted Friday, October 1st, 2010 - 11:05 am
  • » I am trying to help my elderly father with his 815 TS-100 Casio watch that I bought him on retirement in 1989.

    His watch springs jumped out when taking the back off to fit a new battery. Like Bobby White (above 17th September 2009) the short spring fits next to the battery fixing clip ....... but where does the other one go?

    I can confirm the information about the reset jumpering with a paperclip or a jeweller's fine screwdriver.

    Can anyone offer a scan of the back of the watch showing the spring locations, please?

    It would keep me happy and help a rather upset father!
  • by: Marjorie Drew, submitted Wednesday, December 1st, 2010 - 3:05 pm
  • » Please inform me as to which battery i should replace in my Casio TS 100. 815
    thanks
  • by: Henry, submitted Thursday, January 13th, 2011 - 6:42 am
  • » Sir, recently i opened my watch a casio 815 TS100 and two spring like things dropped out. where do they go? then i could not refit the battery retaining clamp . please help
    thanks
  • by: Henry, submitted Thursday, January 13th, 2011 - 6:46 am
  • » Reading your crazy mails I realized that I also have this stupid watch on my wrist for 21 years now. Need to buy the fourth strap soon.
    I think I'am getting attached to it....
    Anyway, "LOC" indeed means local and the function provides average temperatures for each month at that particular location. Did you know that when you set the local time in the world time function that it also corrects for winter/summer time?
    Amazing watch!
  • by: Wim V (Netherlands), submitted Wednesday, February 9th, 2011 - 12:05 pm
  • » I have one of these beauties! My sister bought it for my birthday back in 1990 and it's been everywhere with me since!

    I've just managed to get a genuine Casio strap for it via eBay - which will be its third!

    It's late into its second battery - so I imagine that's due to die any time soon!

    It's been (and continues to be) a great watch! Although it's a little scratched these days, and the "WORLD TIME" and "THERMOMETER" lettering has all but disappeared, it continues to perform flawlessly!

    A true gem - and I love it. :)
  • by: Chris - somewhere in the UK!, submitted Monday, February 14th, 2011 - 2:11 pm
  • » I had this watch since 1991, and sadly yesterday the case broke, for the 2nd time, and I just learned that Casio doesn't have any spare parts from this watch to change... how sad! This watch was just perfect in everything! I guess now I'll have to find a worthy substitute for it.
  • by: Gabriele, submitted Thursday, March 31st, 2011 - 3:41 am
  • » I'm on my second watch my wife saw how upset I was back in 2003 when I broke the part where the pins went in after changing so many watch bands. Now I only use Casio bands on this one. Like others who have posted here I keep my eyes open for the next one. I'd estimate the value of this one to be about $110, in pretty good shape but I won't part with it. Had to put in a fresh battery after 8 years but this battery keeps the time more accurate.
  • by: Dave, submitted Saturday, May 21st, 2011 - 5:01 pm
  • » Can anyone answer that question about the long spring, where does it go?
    Seems a lot of people have the same problem.
  • by: Stuart, submitted Thursday, July 21st, 2011 - 2:12 am
  • » They've had the strap for sale in a local store for years - it went out of stock just this year, I think. This thing is built to last! I still use it off and on.
  • by: Ann, submitted Friday, August 19th, 2011 - 3:02 pm
  • » I had one of these beauties until I sent it away for repairs (going through batteries excessively) when it was lost in the mail. That was over 8 years ago. If anyone has connections, I would like to buy another one. Thanks
  • by: Peter, submitted Saturday, August 20th, 2011 - 5:11 pm
  • » yo. i have a ts200 in great shape...ive never cared about the time, its the temperture!! some of my friends ask me the temp all the time because they know how much i like my watch and plus lets face it, i tell the temp all the time. hahaaha!
    thanks for putting this up. cool!..never knew this watch model was so liked by others too..and it has little brothers/sisters.. its like my friend Mr.Temperture just found its family now.
    im really happy about this!
    btw its 78 now.
  • by: Farmer, submitted Monday, September 12th, 2011 - 3:33 pm
  • » I had this watch as a kid and loved it! I remember boring my friends by incessantly telling them the temperature in various locations around the world.

    Sadly it died eventually.
  • by: John, submitted Tuesday, October 25th, 2011 - 2:22 am
  • » Rrrrr! I had one of these for the last fifteen to twenty years, and I just lost it somewhere in Florida. I miss it like a lost dog. I even woke up thinking I had heard its alarm last night. I can't sleep.
  • by: Andrew, submitted Tuesday, November 29th, 2011 - 11:42 am
  • » Finally, I was looking for something like this for a long long time. Please, I need some help from experts - I have this watch but in car accident, I have earned a broken housing and broken bracelet. Where to buy those? I`m from Serbia(eastern europe)

    Best regards,
    Dejan :)
  • by: Dejan Stefani, submitted Tuesday, December 6th, 2011 - 7:22 am
  • » Thanks for the help especially Thomas who told us about the AC hole to reset after changing battery. This is the most critical part in getting the watch going.

    Battery changing is not difficult: be careful when you unscrew the back cover; put it flat on a table and DO NOT turn watch over otherwise the two springs will fall out. Use a pin to push SIDE clip of battery holder to release the grip. after changing battery, first secure one side of holder in place then gently push the other side sideway to clip in place. Re-start with AC hole as Thomas suggested.
  • by: michael C (Hong Kong), submitted Tuesday, January 24th, 2012 - 9:11 am
  • » I had this watch. Was the last present my Gran bought me around 1990 before she passed away. Heart warming to see it again. I took for granted the features it had until i got a new watch recently. Way ahead of its time. Great thread. Anyone else have the issue with the moulding holding the strap?
  • by: Adrian, submitted Monday, February 6th, 2012 - 4:36 pm
  • » I bought this awesome watch back in 1990. Wore it for about 5 years off and on and then put it in a drawer for the past 17 years. A month ago I "found" this watch in my childhood room along with two other Casio's (Casio Data Bank 1990's and Casio Speed Memory 100 1990's). I changed the battery on the TS-100 myself and had a hell of a time. I ran into the problems mentioned by other posters. Where you insert the battery (CR1620 I bought from Walmart $5) and the watch display shows a garbled message or it shows a clear message but then the battery moves and then shows nothing. Really sensitive. Even when I put the case back on, it still didn't work consistently. I had to fold a torn piece from a business card, place it on the top of the battery and then put the case back on to keep it down firm, and it worked fine after that. I also had the problem of one of the springs falling out. I have no idea where it goes to put it back. The one by the battery is still there, but another one came out when I turned it upside down with the caseback off. But it seems to work fine regardless. I am sure the rubber seal is not effective anymore so I will not submurse it under water. I had to also replace the strap as the rubber original snapped off back in 1995. I fell in love all over again. It's still in excellent condition. I.e., all the lettering is there, markings intact, minimal scratches on the black casing. Crystal is in mint condition. Thank you for making this appreciation site. Great job!
  • by: Daniel, submitted Sunday, December 9th, 2012 - 8:16 pm
  • » I have one that I purchased in the late 80's. Still running strong. My only problem is a few vertical segments where the LCD no longer displays. Of course this is in the day/date/thermo portion. No real fix that I can find. I still love it!
  • by: Tait, submitted Monday, April 30th, 2012 - 10:28 pm
  • » One spring has a bend and goes into a hole at the bottom to connect the circular temperature thing on the front to the back case. The bend goes in first.

    The second spring goes into the hole at the upper left of the battery (across from the AC hole).

    I only had the bent spring, so I replaced the alarm spring with a piece of soft solder. Any sort of copper wire, piece of a resistor/capacitor/LED lead will work as long as it isn't too firm like paper clip metal. Heck, even a guitar string should work.

  • by: J, submitted Tuesday, July 17th, 2012 - 9:17 am
  • » have this watch with all the functions working,except for adjusting the time.
  • by: Paul Coste, submitted Sunday, November 4th, 2012 - 5:37 pm
  • » This was my favorite digital watch as well. I bought mine around 1990 and used it for about 15 years before the alarm stopped working. I have never found a watch quite as good.
  • by: Ron S., submitted Thursday, November 22nd, 2012 - 6:08 pm
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