Seiko Cal. 6644 - 331

The Seiko 6644-331 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-d3ada36b8e12]

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1979

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