Seiko Cal. 5645 - 837

This Spring Drive model from 1977 features a 46mm Titanium case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-13775a90db8d]

Also known as: Bullhead, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1977

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