Seiko Cal. 6636 - 438

The Seiko 6636-438 represents an important milestone in Seiko's 1981 lineup. Powered by the 6636 caliber with 23j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-e3b6030ef8fe]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

110m

Dial Color

Champagne

Jewels

23j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1981

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