Seiko Cal. 6651 - 665

The Seiko 6651-665 represents an important milestone in Seiko's 1968 lineup. Powered by the 6651 caliber with 34j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-7dacdc8a8415]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Champagne

Jewels

34j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1968

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