Seiko Cal. 6637 - 843

The Seiko 6637-843 represents an important milestone in Seiko's 1968 lineup. Powered by the 6637 caliber with 29j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-6dd4f54b7d84]

Also known as: Goldfeather, Crown

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1968

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