Seiko Cal. 6643 - 922

The Seiko 6643-922 represents an important milestone in Seiko's 1993 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-a31a1aa1bd3e]

Also known as: Sumo, Arnie

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1993

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