Seiko Cal. 6640 - 307

Seiko 6640-307

This Quartz model from 1972 features a 46mm Titanium case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-51b5bd46e343]

Also known as: Shogun, Navigator

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
46mm
Case Thickness
15.3mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
40m
Dial Color
Black
Jewels
31j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1972

Related Models

seikata-wm-51b5bd46e343