UNIVERSAL re f.22403 AÉRO-COMPAX STEEL. Universal, Genève, “Aéro-Compax”, case No. 1206334, Ref. 22403.. Made in the 1950s.. Fine, stainless steel aviator wristwatch with square button. chronograph, registers, tachometer, memento dial and two. crowns.
C. Three-body, polished and brushed, lapidated lugs, winding. crown at 9 for adjusting the memento dial, snap on case back. D. Matte silver with luminous baton indexes, outer minutes. and seconds track with every Arabic markers, subsidiary dials. for the seconds, the 12-hour and 30-minute registers and the. memento in 12 hours, outer tachometer scale. Luminous blued. steel baton hands. M. Cal. 287, frosted gilt, straight line lever escapement, monometallic. balance, self-compensating Breguet balance spring. index regulator.. Dial, case and movement signed.. Diam. 37 mm. Thickness 13 mm.