Seiko Cal. 6640 - 750

Seiko 6640-750

This Solar model from 1969 features a 36mm Titanium case. With its 20mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-2667b0efe940]

Specifications

Movement
Solar
Case Material
Titanium
Case Width
36mm
Case Thickness
9.7mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
190m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1969

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seikata-wm-2667b0efe940