Seiko Cal. 6643 - 887

The Seiko 6643-887 represents an important milestone in Seiko's 1979 lineup. With its 20mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-3b89995589a7]

Also known as: UFO, Rally

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Green

Jewels

17j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1979

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