Seiko Cal. 4531 - 602

This Hand-Winding model from 1974 features a 37mm PVD Black case. Powered by the 4531 caliber with 20j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-093de400e5ae]

Also known as: Navigator, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1974

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