Seiko Cal. 4428 - 431

This Solar model from 1972 features a 34mm PVD Black case. Powered by the 4428 caliber with 29j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-f6bec1e39346]

Also known as: Tuna, Crown

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

34mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1972

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