Hi, I have a Hamilton Tenor Sax, Stamped "Made In Czechoslovakia" Serial number 93134 with a letter "I." in a circle under the serial number on the back under the thumb rest. I have been searching for 19 years for information on the age and origins of this horn. I am thrown off by the Czechoslovakia part or I would assume it was a Conn stencil. Maybe a Keilwerth stencil?? I really don't know. Anyone else?