Seiko Cal. 6691 - 975

The Seiko 6691-975 represents an important milestone in Seiko's 1975 lineup. With its 22mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-ca74fd1547ab]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

35j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1975

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