Seiko Cal. 4431 - 988

Seiko 4431-988

This Quartz model from 1983 features a 42mm Hardlex-Coated Steel case. Powered by the 4431 caliber with 21j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-e4c47a63ae5c]

Also known as: Turtle, Helmet

Specifications

Movement
Quartz
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
13.7mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
60m
Dial Color
White
Jewels
21j
Frequency
21,600 bph
Power Reserve
57 hours
Year
1983

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