Seiko Cal. 5637 - 651

The Seiko 5637-651 represents an important milestone in Seiko's 1991 lineup. With its 22mm lug width and 14.4mm profile, it sits comfortably on most wrists. [seikata-wm-4bf82dacda9f]

Also known as: Turtle, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

17j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1991

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