Seiko Cal. 6670 - 728

The Seiko 6670-728 represents an important milestone in Seiko's 1980 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-d5e0ae1e6232]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1980

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