OROLOGIO DA POLSO DA UOMO ZAIS CON CRONOGRAFO, ANNI '40

MEN’S WRISTWATCH ZAIS WITH CHRONOGRAPH, '40S
Three body circular steel case, concave lugs, snap on back n. 276628. Not original bracelet.
Black dial, signed “Zais Watch”, Arabic hour numerals, minute/seconds division, outer telemetric and inner snail tachymetric scales, sunk subsidiary dials for the seconds and 45-min register. Breguet hands.
Manual winding movement, signed “Zais Watch”, based on Valjoux caliber, nickel-finished, column wheel system for the chronograph, lever escapement, monometallic balance with screws, Breguet hairspring.
Diameter Ø: 38 mm
Note: working but to service.