Seiko Cal. 6691 - 735

Released in 1972, the Cal. 6691 with design code 735 was part of Seiko's domestic market collection. Powered by the 6691 caliber with 34j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-68e1d00a482d]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

34j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1972

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