|Please note: My area is BRASS instruments, not other wind, string or percussion instruments. I will provide information on antique, obscure and out of production BRASS instruments. 1) Please don't ask for evaluations, I'll not provide them on this site. 2) I am often asked very similar questions, so I'd invite you to first check on Horn-u-Copia.net. Much of the information I have garnered about this topic, I have posted on this WEB site.|
It is probably a tenor, but the best way it to measure the tubing from the mouthpipe to the bell. If the length of the horn - if it were straightened out - is around 106 inches, then it is a tenor, if
I'm not certain on the US marking, but have always assumed that they were acquired by the Quartermaster Corps, and were just abbreviated US to indicate that they were purchased for military use. Regarding
Cavalier was a sub brand of Pan American which was a student line for Conn. That doesn't mean that it is a lessor instrument, just that they had different marketing ideas for the brand. Cavalier
It's a bit older than 60 years, it 106 years old. I've got one that is slightly older than yours, but it is surprisingly modern looking. It doesn't look its age and I suspect yours does not either.
Many music stores would want a 'house brand', so they would contract with a manufacturer to make instruments which they would then label them with their own brand name. I have a table that lists the makers