Seiko Cal. 3877 - 991

Seiko 3877-991

This Automatic model from 1978 features a 37mm Hardlex-Coated Steel case. Powered by the 3877 caliber with 18j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-6876646c3f85]

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
13.3mm
Lug Width
21mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
120m
Dial Color
White
Jewels
18j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1978

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seikata-wm-6876646c3f85