Seiko Cal. 6643 - 591

Seiko 6643-591

This Spring Drive model from 1971 features a 36mm Titanium case. With its 21mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-984d24d7b184]

Also known as: Navigator

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
36mm
Case Thickness
13.4mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
100m
Dial Color
Cream
Jewels
32j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1971

Related Models

seikata-wm-984d24d7b184