Seiko Cal. 4552 - 311

This Hand-Winding model from 1967 features a 44mm Stainless Steel case. Powered by the 4552 caliber with 18j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-19aceb4e26de]

Also known as: Bullhead, World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1967

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