Seiko Cal. 4427 - 394

This Hand-Winding model from 1975 features a 34mm PVD Black case. Powered by the 4427 caliber with 17j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-533ca5f85b0a]

Also known as: Bullhead, Crown

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

34mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

17j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1975

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