Seiko Cal. 4428 - 877

This Spring Drive model from 1974 features a 34mm Hardlex-Coated Steel case. Powered by the 4428 caliber with 18j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-0ae2cf3bb994]

Also known as: Silverwave, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1974

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