Seiko Cal. 6643 - 495

This Spring Drive model from 1998 features a 39mm PVD Black case. With its 21mm lug width and 10.6mm profile, it sits comfortably on most wrists. [seikata-wm-93504ddda977]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1998

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