Seiko Cal. 6636 - 988

The 6636-988 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6636 caliber with 26j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-c6be282d80ac]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

26j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1979

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