Seiko Cal. 6637 - 964

This Solar model from 1976 features a 37mm Stainless Steel case. With its 22mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-7475757e9af4]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1976

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