Seiko Cal. 5642 - 681

The 5642-681 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 14.0mm profile, it sits comfortably on most wrists. [seikata-wm-126f2fe03fe3]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

14.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Green

Jewels

31j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1989

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