Desperately seeking keyboards!

Do you have any of the keyboards shown below in your collections? They were built in France between 1964 et 1971 by Mincel (later Bouchery&Mincel) in runs of several hundred each and were used for both hot-metal and cold composition.

• GC64R keyboard for Linotype and Intertype linecasters.
• Early GC64 S1, S2, S2B and BBR keyboards.
• Later GC64-713 series and the electronic generation of Keycomp 5 and 10 used with  Lumitype 713-5 and 10, AM-725, etc.

More than 800 keyboards were built for both the French and foreign markets.

If you know of the existence of any of these keyboards, please contact christianflamant@orange.fr