RAF Mk.VIIA 'Weems' wristwatch c.1940

RAF Mk.VIIA 'Weems' wristwatch c.1940

Code: CDFGF8

SOLD

Watch, Wrist, Mk.VIIA, stores reference 6B/159.  Manufactured by Movado, this watch has a stainless steel or solid nickel plated case with a 36-hour keyless Movado Weems type 157 calibre movement.  The bezel has a knurled edge and is in the form of a rotatable scale having 60 divisions with numerals 10, 20, 30, 40, 50 and 60 engraved around the circumference.  The dial has Arabic numerals and the hour, minute and seconds hands are manufactured in blued steel.  Condition is excellent, the case is clean with minimal marks, the bezel rotates freely and can be locked with the lower crown on the right side of the case.  Excellent crystal and whilst the dial has yellowed a little, the patina is even and very pleasing.  Beautiful heavily engraved markings to rear with King's crown, Air Ministry, stores reference and 1940 date code.  This example was supplied to the Air Ministry by the Goldsmiths & Silversmiths Co. Ltd.  Fitted with a modern brown leather strap.  The watch was serviced a couple of years ago and keeps excellent time.  Normally supplied for the use of navigators and pilots, this is a superb example of an extremely rare timepiece.  Stock code CDFGF8.

Approximately 7000 Mk.VIIA watches were supplied to the RAF in 1940, by Longines, Omega, Jaeger Le Coultre, Zenith and Movado, primarily for the use of navigators and pilots.  Movements were manufactured to A.M. Specification G.535. Over periods of 24 hours (when fully wound), tests were made in each of two positions, in the horizontal plane with the dial uppermost and in the vertical plane with the pendant downwards (at room temperature, viz. 10 degrees C to 20 degrees C.), when errors accumulated should not exceed +/- 3 seconds in 3 hours, +/-5 seconds in 6 hours, +/- 8 seconds in 12 hours, +/- 15 seconds in 24 hours.