Seiko Cal. 4413 - 955

This Hand-Winding model from 1973 features a 44mm Hardlex-Coated Steel case. Powered by the 4413 caliber with 20j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-6ac18cbd5c9a]

Also known as: Bullhead, Helmet

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

20j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1973

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