Seiko Cal. 6643 - 756

The Seiko 6643-756 represents an important milestone in Seiko's 1967 lineup. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-b007761edc86]

Also known as: Shogun, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1967

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