Seiko Cal. 0731 - 538

This Hand-Winding model from 1966 features a 46mm Hardlex-Coated Steel case. It features a Green dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-5b5b0060c356]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1966

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