Seiko Cal. 5640 - 584

The 5640-584 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-7e3dae9e4b2a]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1997

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