Seiko Cal. 4431 - 237

This Quartz model from 1968 features a 45mm Hardlex-Coated Steel case. Powered by the 4431 caliber with 33j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-3ceae1cde348]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1968

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