Vacheron Constantin, Ref. 4348, Fine and rare aluminium open face keyless wind pocket watch, no. 347748, circa 1956 Movement: Cal. 439/7, lever escapement, 17 jewels Case: Aluminium three piece snap case, back cover engraved Presented to C. W. Hensley by Northern Aluminium Company Ltd. in recognition of long and loyal service 1956 Size: 44mm Signed: Case back, dial, movement Accessories: Vacheron Constantin leather case It is believed that less than 300 of these pocket watches were produced. This was at the request of the Northern Aluminium Company, who later went to become the Aluminium Company of Canada. These were presented as gifts to employees on retirement.