I'm quite confused about the whole history of Boosey and Hawkes and Besson. I'm trying to figure out if a tenor horn listed as a Boosey and Hwakes round stamp Sovereign and a Besson Round Stamp Sovereign are really the same thing or not. Does the round stamp or globe exist under both the B & H and Besson naming, and if so is one more valuable than the other. So, in other words, I think, is a Sov a Sov? and is a B & H round stamp sov the valued instrument everyone is talking about or is that esteem, reserved solely for the Besson Round stamp sov (if it really exists) Sorry, don't see enough of them here to be clear on the history and naming....any clarification appreciated.