Seiko Cal. 5644 - 698

This Spring Drive model from 1987 features a 45mm Titanium case. With its 18mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-cada88b96db6]

Also known as: Bullhead, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1987

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