Seiko Cal. 6643 - 678

The Seiko 6643-678 represents an important milestone in Seiko's 1980 lineup. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-16fb5ec51c84]

Also known as: Goldfeather

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1980

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