A WW2, British Army Service, A.T.P. wristwatch made by Moeris, Switzerland. The earlier, 1939-1943 military watch, with nickle-silver case over brass. The silvered dial with 1-12 hour digits, and subsidiary seconds at  6 0'clock. The reverse with screw-style case-back bearing the broad, War Department arrow, and designation, 'A.T.P. 6392.'  Movement with 15 jewels.

Condition report: Case showing light wear. The dial clean, and with luminous hour markers. The plexi-glass discoloured to a typical yellow. This gives a pleasant look to the watch, however a replacement glass would provide greater clarity to the dial. Case-back generally clean and free from adverse scratches: one scratch visible between 1.0'clock & 4.0'clock. Movement clean and functioning. No warranty implied.

Note: During WW2, Moeris supplied the British Army with an interesting variant of the ATP wristwatch. It was a little larger than many of its military counterparts, but the movement was a comparatively smaller than the case diameter. The void between the inner edge  to the case and the movement was fitted with a soft, iron, inner-shield which surrounded the movement. This arrangement protected the vulnerable hairspring from strong magnetic fields and became known as the Faraday Shield.*

Note: The magnetic field generated by a radio transmitter is likely to have an adverse effect on the timekeeping for watches and clocks in relative proximity, consequently Moeris watches may have been designed specifically for radio operators who required particularly accurate watches for monitoring radio communications: radio operators were responsible for message release, conclusion and monitoring - which included message timing and duration. Recipients also timed  any incoming communications.   

A scarce and interesting timepiece.

*Michael Farday FRS, (1791-1867). English chemist and physicist who contributed substantially to the fields of electormagnetism and electrochemisty.

Further Reading: J.D. Krauss, Electormagnetics, 4Ed, McGraw-Hill, 1992. ISBN: 007 9356211.