Seiko Cal. 6640 - 406

Seiko 6640-406

This Solar model from 1966 features a 41mm Stainless Steel case. With its 19mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-0feacba9d41d]

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
41mm
Case Thickness
11.6mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Green
Jewels
21j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1966

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