Seiko Cal. 6640 - 285

Seiko 6640-285

This Solar model from 1977 features a 45mm Titanium case. Powered by the 6640 caliber with 23j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-42aa567f6973]

Specifications

Movement
Solar
Case Material
Titanium
Case Width
45mm
Case Thickness
10.5mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
23j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1977

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