Seiko Cal. 6643 - 393

The Seiko 6643-393 represents an important milestone in Seiko's 1985 lineup. It features a Burgundy dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-3a08fca1b16b]

Also known as: Sumo, Shogun

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1985

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