Seiko Cal. 3831 - 733

Seiko 3831-733

This Hand-Winding model from 1972 features a 42mm Hardlex-Coated Steel case. Powered by the 3831 caliber with 36j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-853b9c4e0540]

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
15.7mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
150m
Dial Color
Green
Jewels
36j
Frequency
28,800 bph
Power Reserve
42 hours
Year
1972

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seikata-wm-853b9c4e0540