Seiko Cal. 6643 - 881

The Seiko 6643-881 represents an important milestone in Seiko's 1985 lineup. With its 19mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-0f22c1902be1]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1985

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