Seiko Cal. 6643 - 665

The Seiko 6643-665 represents an important milestone in Seiko's 1988 lineup. Powered by the 6643 caliber with 29j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-cb0790c33fc8]

Also known as: UFO, Golden Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1988

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