Seiko Cal. 6635 - 522

This Spring Drive model from 1970 features a 36mm Gold-Plated case. Powered by the 6635 caliber with 18j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-1f7ff5e82c43]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

White

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1970

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