I have one of these early Buffet clarinets. The serial number puts my clarinet as being manufactured in 1925. These are pre-R13 but they are professional level clarinets. I have recently had mine re-padded and the wood re-oiled (my tech said it was getting pretty dry) so it is now in perfect shape. There was no "model" name so to speak. The one really unique and obvious characteristic of the keywork is that the register key curves around the horn!