Seiko Cal. 6643 - 920

The Seiko 6643-920 represents an important milestone in Seiko's 1996 lineup. Powered by the 6643 caliber with 33j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-03301d66bb8f]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1996

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