This C melody was made for Holton on the Pan American of the Conn factory. 

Beaufort American was one the names that Holton put on their horns. Was it a model? Was it simply a different line? That is unclear to me at this point.

Holton did make their own Beaufort American horns after 1928, but this is clearly not one of them. The patent number tells us who made it. 

The case and the screw driver are likely original accessories to the horn. As is probably the Conn Eagle C MP that is with it. 

This horn is in remarkable condition, and only needs a new home with a new owner--and of course a full overhaul.