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Juvenia was founded in 1860 by Swiss watchmaker Jacques Didisheim. They were/are primarily known for producing distinctive, unusual watches. The Juvenia “Architecture” used a protractor and ruler for highly innovative time indication, and the “Trigone” featured large triangular hands.
The “Arithmo” model, offered here today, was introduced in 1945 and featured a rotating slide-rule bezel. This watch was the world’s first calculator watch.
The example offered today is in great vintage condition. The case is sharp and appears untouched/unpolished. The dial is in beautiful condition, and has developed a light patina. The original plastic slide-rule bezel is in good condition, and rotates freely in order to calculate figures as it should.
This example is extra special, because it also features the original box, instruction booklet, and sales receipt, dating the sale to 1951, for 31.50. The currency isn’t indicated, but it seems these have increased in value since then!
Time-only, with slide rule