Seiko Cal. 6640 - 571

Seiko 6640-571

This Solar model from 1976 features a 39mm Two-Tone case. With its 21mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-15aa4d8e12ea]

Also known as: Goldfeather

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
39mm
Case Thickness
11.4mm
Lug Width
21mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Cream
Jewels
18j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1976

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