Seiko Cal. 6390 - 640

Seiko 6390-640

This Solar model from 1968 features a 46mm Titanium case. With its 19mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-bda116797a88]

Specifications

Movement
Solar
Case Material
Titanium
Case Width
46mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Black
Jewels
28j
Frequency
21,600 bph
Power Reserve
39 hours
Year
1968

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