Seiko Cal. 6635 - 632

The 6635-632 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6635 caliber with 25j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-29d99c0ffec3]

Also known as: Bullhead, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1971

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