Seiko Cal. 6639 - 491

This Automatic model from 1997 features a 44mm PVD Black case. Powered by the 6639 caliber with 25j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-03fb7bdbd54c]

Also known as: Sumo, Silverwave

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1997

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