Seiko Cal. 3870 - 691

Seiko 3870-691

This Hand-Winding model from 1976 features a 40mm Gold-Plated case. Powered by the 3870 caliber with 31j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-01e71c24625b]

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
13.5mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
White
Jewels
31j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1976

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seikata-wm-01e71c24625b