Seiko Cal. 6643 - 806

The Seiko 6643-806 represents an important milestone in Seiko's 1991 lineup. Powered by the 6643 caliber with 35j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-59f5942e87c5]

Also known as: Monster, Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

40mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1991

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