Seiko Cal. 6643 - 151

The Seiko 6643-151 represents an important milestone in Seiko's 1974 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-15365bd298fd]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1974

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