Seiko Cal. 5640 - 586

The Seiko 5640-586 represents an important milestone in Seiko's 1966 lineup. Powered by the 5640 caliber with 24j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-c943c5a637c5]

Also known as: Navigator, Sea Horse

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1966

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