Seiko Cal. 6643 - 682

The Seiko 6643-682 represents an important milestone in Seiko's 1979 lineup. With its 19mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-d5444dc5da4b]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Green

Jewels

27j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1979

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