 


| Longines 12.68Z
Features manual wind sub second
Data 12''', Dm= 27mm H= 4.25mm 17/17 jewels f = 18000 A/h power reserve 40h
| Remarks 1938- early samples with bimetalic balance
Example, year: signature; shock device 1-2) 1940: 60808488, Longines - Longines (bimetalic balance) 3-4) 1955: 9640635, Longines, Swiss, 17 Jewels - Longines; Incabloc
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