Seiko Cal. 6691 - 137

The Seiko 6691-137 represents an important milestone in Seiko's 1998 lineup. Powered by the 6691 caliber with 36j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-8c175e9ae320]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1998

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