Seiko Cal. 6635 - 355

The 6635-355 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6635 caliber with 26j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-5234736d8311]

Also known as: Helmet, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1967

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