Seiko Cal. 6643 - 615

The Seiko 6643-615 represents an important milestone in Seiko's 1974 lineup. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-6be0381a486b]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1974

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