Stores reference 6E/340, reissued as 6E/50. Swiss made 15-jewel movement. White metal case approximately 5cm diameter. White dial with Arabic numerals and luminous hands plus subsidiary seconds dial. Luminous dots at 5 minute intervals on the chapter ring. Screw backed case with Air Ministry 'A.M.' markings, '6E/50', serial number and 1941 code engraved. The dial is good if a little discoloured and the 'crystal' has only minor marking. The case has normal wear and a small dent to the rear cover. Good working order when test run for 24 hour periods. Pocket watches like these were preferred by navigators who found it easier to place the watch on their maps and charts whilst working. Stock code C21875.