Seiko Cal. 4428 - 503

This Spring Drive model from 1979 features a 41mm Hardlex-Coated Steel case. Powered by the 4428 caliber with 32j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-d386912d46e9]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1979

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