Seiko Cal. 6691 - 837

The Seiko 6691-837 represents an important milestone in Seiko's 1970 lineup. Powered by the 6691 caliber with 26j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-683668689b2d]

Also known as: Arnie

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1970

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