1983 Casio CFX-200 Scientific Calculator Watch

__SPACER__ If calculator watches were a UI stretch, then the Scientific Calculator Watch is the absolute zenith of this insanity. The CFX-200 was the first Casio Scientific Calculator Watch.

19 Responses to “1983 Casio CFX-200 Scientific Calculator Watch”

  1. Rod Says:

    I had one of these around 1988. I was working in a machine shop, and the calculator functions came in pretty handy. Unfortuately, the case cracked from shock while working, but it took a couple of weeks for it to stop working, even though it was constantly being soaked in cutting lubricant. I lost the job not too long afterwards, and I graduated to less dorky watches.

  2. Jeff Says:

    Best watch ever. Twenty four years after I got it as a gift, I’m wearing it on my wrist as I type this. The back plate gasket has disintegrated and I’ve chipped a corner of the front glass. But it continues to function as well as ever. In addition to scientific functions like roots, sin, cos, tan, log, pi, deg/rad/grad, parenthesis functions, etc. it also does very handy englishmetric conversions. And, of course, it has a stopwatch and alarm. It does standard or military time and has a light button for night viewing. To this day, no other device (watch or otherwise) has matched its performance and compact form factor. Though I too have less dorky, even stylish and refined watches, this one remains my favorite and I’ll mourn the day it dies.

  3. Moi Says:

    I shudder to admit that I got married wearing this watch. I still have it; it just needs a fresh battery.

  4. Kurt Says:

    Bought mine in 1981. Have worn it everyday since. The light is starting to go and the buttons are starting to stick a little but still work. I plan to keep wearing it for another 27 years (I will be 70 then). Other than replacing the battery every 12-18 months, it is a great watch.

  5. Jim Brown Says:

    I had mine since 1983 and it still works great. The LCD screen does not seem as bright, that could just my eyes getting older.

  6. laederich Says:

    I would like to buy a casio CFX 200.
    Do you know where?

  7. George Says:

    I have a CFX-200 I bought while stationed in Korea in the early 80’s. I’ve lost the manual for it and haven’t worn it for years. I finally put a new battery in it but I’ll be darned if I can remember how to set it. If someone could e-mail me those of even a scanned copy I would be very appreciative. I would like to be able to use it again.
    Thanks, George

  8. Mezmo Says:

    @George: The website posted above has a scan of the manual: http://veiks.com/misc/cfx200.html

  9. chevallie Says:

    I found this watch in very very great condition, it’s the most beautiful casio watch i have ner seen, amazing.


  10. Atul Asthana Says:

    I had bought one CFX 20 in 1983. Its a marvell of functionality in tiny space.
    It was very handy for navigation calculations while at sea. And functioned for over 8 years, before succumbing to humidity.
    I still have the entire watch intact, no damage at all except for a little whitening of the buttons.
    Would love to see it working again.

  11. Suhas Says:

    I have this. My Granpa Gift. I have to say THE BEST WATCH EVER!!! I must its a lil dorky, but who cares?

  12. Andrew Stonebridge Says:

    I had one of these. Why don’t they re-make them. Please! One of the buttons fell out and I sent it to Casio to see if it could be repaired and that was the last I saw of it :-(
    Had everything you needed at your fingertips. I want one again

  13. lee Says:

    I had one of these in the mid 80’s. Bought at Best Co. near Washington DC, and once got caught using on a test in school I have been looking at these on ebay and considering paying a rediculous amount. I find myself being very nostalgic these days, I fear it is unhealthy and may need to see if they have a pill for this!

  14. Euriel Says:

    Does anyone knows where can I find the battery for this watch ?.. does anyone can provide me the battery model. I need to replace it to my Best watch.. !!!

  15. Steve Says:

    Hey lee - I’ve finally decided to sell my near-perfect CFX-20. It was seldom worn - I preferred keeping it in my pocket without the strap. Therefore, the strap almost unused! Has been in my drawer for near 25 years. Replaced the battery last year and it functions perfect.

    I’ll eventually put it on Ebay, but it is available now. Can email my google account: 2poker2

  16. Rodrigo R. Ventura Says:

    I have this watch I bought in Bahrain in 1983. It is still working and I only need to replace the battery every 18 months
    or two years . All keys are functioning and doesnt have any physical damage. I can sell it on good offer. Thanks

  17. The Nerdiest Calculator Watch On Earth | Gizmodo Australia Says:

    […] I’m not sure if the 1983 Casio CFX-200 is the best balance of function and I-could-actually-wear-this-thing, but it’s the most wonderful usability trainwreck I can find. 23 buttons! Many of which are multifunction buttons. Surely this is the Audi R8 of calculator watches, in which misuse will almost certainly lead to death. Got a better one? I would loooooove to know about it. For now, you can check this baby out on eBay. Auction’s going on now. [eBay via Oobject] […]

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    Hey I know this is off topic but I was wondering if you knew of any widgets I could add to my blog that automatically
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  19. Francisco Says:

    Hi! I have one CFX 20. The case is in very good conditions but I need to replace de module. Do you know how to find a new module 197 for my CFX 20? Thanks you very much.

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