Pan American 64H Champion
Date: 1931-1946. Owner unknown
The "Pan American" models were instruments made by Conn but without the Conn logo or name on them. This particular instrument is said to have been used by its owner in the 40's. Since it isn't a stencil line (marked with the name of the reseller) it should be a 64H.
What Pan American said in 1938:
Air-tight, carefully ground "Slik-Slide" and rich, mellow tone. Built in Bb, medium bore, 7" bell. Internal mouthpipe! Note balancer and slide lock. Complete with all accessories in formed case with red crushed plush lining.