Seiko Cal. 5637 - 439

This Solar model from 1972 features a 39mm Stainless Steel case. With its 19mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-9bad56a2c716]

Also known as: Bullhead, Arnie

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1972

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