Seiko Cal. 6639 - 491

Seiko 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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