Seiko Cal. 4427 - 179

This Spring Drive model from 1973 features a 40mm Hardlex-Coated Steel case. Powered by the 4427 caliber with 25j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-7b2e632de4b5]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1973

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