In-house and other movements

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In-house and other movements

Post by koimaster » July 10th 2020, 10:29pm

In 1888, when the Kurth brothers founded their company called Kurth Frères, only watch parts and movements were produced. These were sold in Switzerland and France. Various manual-winding movements were in the product range until 1947 when the first self-winding movement – the hammer-winding KF 360 – came out. The first self-winding movement with a rotor (the KF 21-0114 movement, introduced in 1950), was derived from the AS 1323 movement. Finally, in 1951 with the 25-45, the first Certina-developed self-winding movement came onto the market. The 28-45 movement line was launched in 1953 and had the same construction characteristics as the previous movement, except that the diameter was 3mm bigger. Maybe you had already noticed: the first number in the movement designation stands for the diameter in millimetres.
In 1954, Certina began providing Hamilton with self-winding movements, and did so for a few years. Hamilton saw a need to add automatic wristwatches to their line but they had no such movements.

http://www.vintagecertinas.ch/en/movements-en/
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