Seiko Cal. 6644 - 425

This Spring Drive model from 1978 features a 37mm PVD Black case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-735ddd7a55d6]

Also known as: Navigator, Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1978

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