Seiko Cal. 6691 - 740

This Spring Drive model from 1991 features a 43mm Stainless Steel case. Powered by the 6691 caliber with 19j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-ed6d13061fad]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1991

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