10s vintage watch WWI Longines trench 925 Sterling Silver Cal 12.92 militaryFrom 1913 This is a remarkably Longines trench watch, powered by the high grade manual wind calibre 12. 92. Both the movement and case share matching serial numbers, confirming its authenticity and dating it to the same era in which Longines introduced the celebrated 13. 33Z chronograph. This is a rare opportunity to acquire an exceptionally example of an early 20th century Longines trench watch. Case: o Sterling Silver 925 serial 3'094'745, was