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| Longines 340 Features automatic sweep second Data 12''', Dm= 27.0mm H= 4.55mm 17 jewels (without ball bearing) f = 19800 A/h power reserve 43h | Remarks 1960- ball-bearing rotor with peripheral gear out of center, optionally, probably always with 5 ruby balls (not included in jewel number, cf. Longines 345) rather large balance unusual: ratchet on dial side, crown mechanism with rocker bar family/generations: respectively 1. two-section base plate 2. one-section base plate 3. date redesigned 340, 342: sweep second 341, 343, 345: sweep second, date 350, 352: sub second 351, 353, 355: sub second, date 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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