Seiko Cal. 6638 - 746

The Seiko 6638-746 represents an important milestone in Seiko's 1991 lineup. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0c81a23aeaee]

Also known as: Samurai, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Champagne

Jewels

28j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1991

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