Seiko Cal. 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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