Seiko Cal. 6643 - 323

The Seiko 6643-323 represents an important milestone in Seiko's 1991 lineup. Powered by the 6643 caliber with 32j jewels beating at 36,000 bph, it delivers a 65 hours power reserve. [seikata-wm-542eeee9eddd]

Also known as: UFO

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

44mm

Case Thickness

13.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1991

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