Seiko Cal. 6637 - 200

Seiko 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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