Seiko Cal. 4536 - 664

This Spring Drive model from 1965 features a 35mm Stainless Steel case. It features a Black dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-601a240270c3]

Also known as: Monster, Bullhead

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

15.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1965

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