 

| Longines 340
Features automatic sweep second
Data 12''', Dm= 27mm H= 4.45mm 17 jewels f = 19800 A/h power reserve 44h
| Remarks 1960- ball-bearing rotor with peripheral gear out of center, rather large balance unusual: ratchet on dial side, crown mechanism with rocker bar
Example, year: signature; shock device 1-2) 1962: 11999182, LXW, Longines Automatic, Swiss, 17 Jewels - 340, Longines; Kif-Flector 3) 1962: 11989570, LXW, Longines Automatic Grand Prize, Longines Watch Co Swiss, 17 Jewels; Kif-Flector
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