Seiko Cal. 6644 - 397

The Seiko 6644-397 represents an important milestone in Seiko's 1979 lineup. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-2ce03a7db940]

Also known as: Navigator, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1979

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