Seiko Cal. 6636 - 674

The 6636-674 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6636 caliber with 22j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-5228b1ef5fe3]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

38mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

22j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1999

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