Seiko Cal. 6635 - 204

The 6635-204 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6635 caliber with 35j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-3df1f0e2fb87]

Also known as: Bullhead, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1982

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