Very old horn...1915?
Missing entire neck, 2 bits, 2 bell screws
Good luck getting the correct parts.
1951 #2341 4 valve King with Holton Bell
2006 Miraphone #282
1960 Conn 14k 4 valve Bb standard bell or helicon bell option
Franken Helicon Conn 20k valves; Mammoth body; Miraphone bell
King fiberglass sousie with brass bell.
Conn24J
So after doing some digging around because i realized I couldn't find an American Standard that looked like this:
-I think it's a holton Collegiate possibly or stencil?
Otherwise i am too lazy to dig, but can spout off what i recall from last time i wasn't too lazy.
It shares the collar on the bell that old Holtons frequently have. But the bell does resemble a king bell in that there are no joints in it. And American Standard is one of the names that merged into King through Cleveland Instruments (failing to recall exact name) although American Standard was also used be used by Lehnert out of Philly. But i would be surprised to find they made a sousaphone.