Seiko Cal. 5664 - 156

This Spring Drive model from 1968 features a 36mm Stainless Steel case. It features a Silver dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-8f6edcf3de41]

Also known as: Bullhead, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

11.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Silver

Jewels

34j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1968

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