Seiko Cal. 6640 - 324

Seiko 6640-324

This Solar model from 1965 features a 35mm Hardlex-Coated Steel case. With its 20mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-f1de28357700]

Also known as: Turtle, Bullhead

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
8.8mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Silver
Jewels
17j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1965

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