Seiko Cal. 4557 - 731

This Solar model from 1971 features a 39mm PVD Black case. Powered by the 4557 caliber with 23j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-0e5eb42ec08d]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1971

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