Seiko Cal. 6643 - 366

The Seiko 6643-366 represents an important milestone in Seiko's 1997 lineup. The Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-fd2138781016]

Also known as: Sumo, Emperor

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

36mm

Case Thickness

11.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1997

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