Seiko Cal. 6643 - 582

The Seiko 6643-582 represents an important milestone in Seiko's 1979 lineup. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-f1ed69436305]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1979

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