Seiko Cal. 6644 - 137

The Seiko 6644-137 represents an important milestone in Seiko's 1979 lineup. The Coin-Edge bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-d47ac141af3d]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1979

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