Seiko Cal. 6644 - 639

This Spring Drive model from 1984 features a 41mm Titanium case. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-8e15ea53a48b]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1984

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