Seiko Cal. 6637 - 775

This Quartz model from 1981 features a 41mm Gold-Plated case. Powered by the 6637 caliber with 23j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-38e673e1e2dd]

Also known as: Helmet, Sea Horse

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1981

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