Seiko Cal. 5641 - 931

The 5641-931 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5641 caliber with 26j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-a248d7913677]

Also known as: Sumo, Goldfeather

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1987

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