Seiko Cal. 6635 - 598

The Seiko 6635-598 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-9b278aa1beb4]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1973

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