Seiko Cal. 6637 - 200

This Spring Drive model from 1968 features a 36mm Gold-Plated case. Powered by the 6637 caliber with 27j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-5d5396fde4a0]

Also known as: Helmet, Silverwave

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

27j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1968

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