Seiko Cal. 6638 - 900

Seiko 6638-900

This Spring Drive model from 1973 features a 40mm Titanium case. The Fixed bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-0d681cc7b4e0]

Also known as: UFO, Navigator

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
40mm
Case Thickness
8.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
90m
Dial Color
Black
Jewels
24j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1973

Related Models

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