UNIVERSAL GENÈVE AÉRO-COMPAX, STEEL.Universal Genève Aéro-Compax, movement No. 210817.case No. 1005153, Ref. 22538. Made in the 1950’s..Fine and rare, stainless steel wristwatch with round button.chronograph, registers, tachometer and two crowns.
C. Three-body, polished and brushed, curved lugs, winding.crown at 9 for adjusting the memento dial, snap on case.back, sapphire crystal..D. Silver with applied luminous dots, outer minutes/seconds.divisions with every fi ve Arabic markers, subsidiary dials for.the seconds, the 12-hour and 30-minute registers and the.memento in 12 hours, outer tachometer scale. Luminous.steel lozenge hands..M. Cal. 287, rhodium plated, straight line lever escapement.monometallic balance, self-compensating Breguet balance.spring, index regulator..Dial, case and movement signed..Diam. 37 mm. Thickness 12.5 mm.