Seiko Cal. 5638 - 735

The Seiko 5638-735 represents an important milestone in Seiko's 1972 lineup. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-d37fd591ffd2]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1972

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