Seiko Cal. 6636 - 944

The Seiko 6636-944 represents an important milestone in Seiko's 1973 lineup. Powered by the 6636 caliber with 18j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-441698eaacaa]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

18j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1973

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