Seiko Cal. 5680 - 640

The 5680-640 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-85beff0e17f7]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

17j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1997

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