Seiko Cal. 6631 - 307

Seiko 6631-307

This Hand-Winding model from 1968 features a 38mm Titanium case. The Bidirectional bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-8c66a93e2ee2]

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
38mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
40m
Dial Color
White
Jewels
20j
Frequency
36,000 bph
Power Reserve
51 hours
Year
1968

Related Models

seikata-wm-8c66a93e2ee2