Seiko Cal. 4438 - 540

This Hand-Winding model from 1972 features a 46mm Stainless Steel case. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-404ceaf1d160]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1972

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