Lot 154

Universal Genève "Jumbo Aero-Compax", Movement No. 231621, Ref. 22403, Cal. 287, 36 mm, circa 1945
An aviator's vintage Geneva wristwatch, large version with chronograph
Case: steel, push back. Dial: silvered. Movm.: 3/4 plate movement, Glucydur screw balance.
In 1940, Universal received Swiss patent number 235608 for the Aero-Compax. Fitted with a fourth subsidiary dial (in addition to contant seconds, minute and hour registers) the wristwatch featured a memento dial which could be used to memorise the starting time of an operation.
Because of its size, this is an extremely rare and highly sought-after model, particularly so in the steel version.