Seiko Cal. 4427 - 774

This Hand-Winding model from 1978 features a 41mm Hardlex-Coated Steel case. Powered by the 4427 caliber with 21j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-209d99543df3]

Also known as: Monster, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1978

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