Early calculator watch prototype

I bought a button calculator watch in ±1978. I did not like it (Ok I don't use my mobile as a calculator as well).

About digital display watches. The museum at the (big hole) diamond mine in Kimberley have a digital watch dated between 1870 to 1900 on display. I visited the museum in ±198x with a brand new digital watch on my wrist. I was amazed to found that there is noting new under the sun. The watch displayed the date, hour and min on 3 disks through windows. (Not MS). I think it had a seconds arm.

I wonder if it was Y2K or even Y19K compatible?

Note the Y19K was a bigger fiasco (in SA at least) than Y2K. An engineering exam paper of 1904 even had a question about it.

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Note the Y19K was a bigger fiasco (in SA at least) than Y2K. An engineering exam paper of 1904 even had a question about it.

I remember my first calculator watch. Bought it ~ 1978 also. It was a Casio with black plastic band. The band failed long before the watch did. I have had several since then, but none that functioned as well. At least in those days I could follow what the EEs that designed the watch wanted me to do to set and use it. It seems that today, everything has a calculator built-in. Good thing, because moost people (myself included) dont do simple math anymore, but the calculators on some devices are so hard to operate that it is easier to do the calculations by hand.

My father bought first calculator in 1970 , that was electrically operated the size of telephone with14 digit 7 segment tube bright display , it is still working with all accounts and auditing facilities built inside .I too use my mobile calculator in emergency but not always , with windows calculator at hand .