Seiko Cal. 6640 - 972

Seiko 6640-972

This Automatic model from 1980 features a 45mm PVD Black case. The Inner Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-0ac4833f43f8]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
45mm
Case Thickness
9.1mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
30j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1980

Related Models

seikata-wm-0ac4833f43f8