ZENITH CON SECONDI CENTRALI, ANNI '40

ZENITH SWIFT SECONDS, 40S
Case: signed, n. 8273523, three-body in chromed metal, snap on caseback.
Dial: signed, silvered, stamped Roman numerals, closed minute divisions, outer division with 1/5th of seconds fraction, Breguet hands, centre seconds.
Movement: signed, manual-winding cal. 18-28-2-1, n. 3053285, gilded, cut compensated bimetallic balance with screws, blued Breguet hairspring, micrometer regulator.
Accessories: –
Diameter Ø: 49 mm
Note: working.