You are bidding for original and rarest MIMO Loga wristwatch with slide rule bezel, Antimagnetic Brevet 216202, made in 1940. Runs great and all functions work as expected. Please take a look at the photos for the condition. Case measures 38mm (excluding the crown). Original dial in very good condition and signed “MIMO, Brevet 216202, Antimagnetic”. New non-signed leather strap. Age related condition with slight traces of wear. Watch is in overall very good condition, running and ready to wear or gift!
MIMO Loga was the first wristwatch with slide rule in the world, which added the C and D logarithmic scales from a slide rule to the watch’s bezel, adding calculation functions to the wrist watch, which would later become a standard of “aviation-style” analog (and the occasional digital) watches. In July of 1940 they applied for a patent regarding the use of logarithmic tables on a wristwatch, one month before Breitling Chronomat. Juvenia followed in 1945 with the Arithmo model, still using the principle of scales to help perform calculations.
Dimensions : 38 mm excluding the crown.