Seiko Cal. 6643 - 728

Seiko 6643-728

This Spring Drive model from 1991 features a 37mm PVD Black case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-8b6b3235d059]

Also known as: Turtle, Pogue

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
12.1mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
200m
Dial Color
White
Jewels
24j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1991

Related Models

seikata-wm-8b6b3235d059