First "Smart Watch" ever, decades before Apple Watch oder Samsung Gear

First "Smart Watch" ever, decades before Apple Watch oder Samsung Gear (derived from simplephpblog file blog\content\15\09\entry150926-202649.txt)

Just take a look at this advertisment for the Science of Cambridge Wrist Calculator, this was really one of the first (or just the first) real smart watch with computing power - and it happened about 40 years before ! It was only available as a kit, and AFAIK it can't show the time (unless you typed in appropriate digits to show up the time) ;-)