Seiko Cal. 4428 - 815

This Automatic model from 1979 features a 39mm Hardlex-Coated Steel case. Powered by the 4428 caliber with 19j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-7d48207772bf]

Also known as: Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1979

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