Seiko Cal. 6635 - 636

The 6635-636 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6635 caliber with 18j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-3aabc90026f2]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1969

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