Seiko Cal. 5640 - 997

Seiko 5640-997

The 5640-997 is a sought-after Solar piece from Seiko's golden era. Powered by the 5640 caliber with 35j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-d85e33488103]

Also known as: Pogue, Silverwave

Specifications

Movement
Solar
Case Material
Titanium
Case Width
46mm
Case Thickness
11.7mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1979

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