Longines 631-440, Yoke spring
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N.O.S. Longines original part. Not in factory packaging.
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Fits Longines cal: 631.1, 632.1, 632.2, 633.1, 633.2, 634.1, 634.2, 636.1, 636.2
Data: Longines 633.1 (Base caliber: ETA 2824)
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25 jewels, automatic wind, center second, hack feature. -
Size: 11,5''' 25,60 mm. -
H: = 4.60 mm. -
N: = 28.800 A/h. -
Power reserve: 40 h.
Versions, suffix 1 = 25 jewels, 2 = 17 jewels.
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631: without second. -
632: center second, hack feature. -
633: center second, hack feature, date. -
634: without second. -
636: center second, hack feature, day, date.