Seiko Cal. 4431 - 227

Seiko 4431-227

This Automatic model from 1979 features a 37mm PVD Black case. Powered by the 4431 caliber with 35j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-8f5e392b73cc]

Also known as: Monster

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
37mm
Case Thickness
15.3mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
36,000 bph
Power Reserve
38 hours
Year
1979

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