Seiko Cal. 6636 - 769

The Seiko 6636-769 represents an important milestone in Seiko's 1980 lineup. Powered by the 6636 caliber with 28j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-3c9ebfd9791d]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

38mm

Case Thickness

10.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1980

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