Seiko Cal. 6637 - 188

The Seiko 6637-188 represents an important milestone in Seiko's 1968 lineup. Powered by the 6637 caliber with 33j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-55a6360f1642]

Also known as: Shogun

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1968

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