Seiko Cal. 5640 - 702

The 5640-702 is a sought-after Solar piece from Seiko's golden era. Powered by the 5640 caliber with 26j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-99c3ae9ca7ec]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

26j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1984

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