WALTHAM AIRCRAFT CLOCK
ELAPSED TIME CHRONOGRAPH – 1953

This mechanical aircraft clock with a 1-7/8-inch dial and one-hour elapsed time capability, featured fluorescent luminescent hands and dial markings. It was manufactured in 17.000 pieces, and equipped many commercial and military aircraft, including the famous F4 Phantom of the American TOP GUN School. It was furnished with an unbreakable antimagnetic cobalt mainspring. The Waltham 22-size aircraft clock movement was housed in an aluminum alloy case, very similar to the AN standard case except that it was deeper in order to accommodate the chronograph mechanism which was positioned on the back plate. The winding-setting and fly-back mechanism were integrally mounted within the case. The glass crystal was placed on a rubber gasket and was held in the case by a double screw-type bezel. The aluminum dial and the unshaded portion of the hands had a matt black finish. The shaded area of the hands and the dial indexes and numerals were coated with a fluorescent luminescent material. The winding and setting knob was located in the lower left hand corner of the case. The elapsed time chronograph functions of start, stop, and fly-back of the sweep second hand and triangular-shaped minute register hand were controlled by a small button at 2 o’clock. Winding/setting was achieved by rotating and/or pulling out the crown at 7 o’clock.


WALTHAM
TYPE-A13a

WALTHAM AIRCRAFT CLOCK | ELAPSED TIME CHRONOGRAPH 1953 Front View
  • 1-7/8-inch aluminum dial with step arrangement.
  • Dial background and hands unshaded portion in a matt black finish.
  • 60 minute Central Chronograph Indicator and sweep second hand.
  • Waltham mechanical 22 size aircraft movement
  • 20 jewels
  • Elapsed Time Chronograph function button
  • Winding/setting crown
  • Power reserve 8 days
  • 21/4-inch black aluminium alloy case
  • Double notched screw-type bezel ring
  • Crystal glass positioned on a rubber gasket
  • Winding and setting crown located in the lower left-hand corner
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WALTHAM WATCH COMPANY SA is a high-end watch manufacturer with offices in Switzerland - center of world excellence in clock and watch production - and a leader in precision mechanical watchmaking for the past 160 years.

Since 1850, the legendary American brand has been setting modern standards for the mass production of clocks and watches, and has over one thousand patents in the sector.

Our offices are based in Switzerland. The headquarter is based in Mendrisio (CH) /Switzerland.

Contact: contact@waltham.ch