Watch Repair Piccadilly - The micro-rotor movement first appeared in 1958 with simultaneous announcements of unrelated projects at Büren and Universal Geneve. Over time, both companies claimed earlier dates, with Büren claiming
BUREN Super Slender, Automatic with calendar. Micro Rotor. Diameter 33 mm. From the 60th - auctions & price archive
![Büren Grand Prix inventeur du microrotor : voici un mouvement Büren 1000 A | LA PASSION DES MONTRES MECANIQUES Büren Grand Prix inventeur du microrotor : voici un mouvement Büren 1000 A | LA PASSION DES MONTRES MECANIQUES](http://michel51.unblog.fr/files/2011/10/burenmicrorotor005.jpg)