Seiko Cal. 5641 - 728

This Solar model from 1990 features a 37mm PVD Black case. Powered by the 5641 caliber with 17j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-bde24d3423a7]

Also known as: UFO, Rally

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1990

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