Seiko Cal. 6636 - 444

The Seiko 6636-444 represents an important milestone in Seiko's 1970 lineup. Powered by the 6636 caliber with 27j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-4c0538145e6e]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

34mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1970

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