Seiko Cal. 5642 - 390

The 5642-390 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5642 caliber with 29j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-2f276af735c8]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1981

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