Rascher used an original Buescher ligature and simply turned it upside-down. I have recently acquired an original silver Buescher ligature and I really like it. Whether or not you believe that material affects tone, I noticed a better, freer resonance with this lig than with my Rovner Mk. III. Also, I think it's cool to try to play on all-original equipment! All I need now for my Buescher is an original silver end-plug!