Seiko Cal. 6643 - 123

The Seiko 6643-123 represents an important milestone in Seiko's 1987 lineup. Powered by the 6643 caliber with 30j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-75adf44edf9c]

Also known as: UFO, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1987

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