1862—London, England
Boosey and Sons becomes sufficiently interested in brass instruments to purchase patent rights to double-slide contrabass trombone, which they market as the Basso Profundo (Myers, Brasswind).
Boosey and Sons becomes sufficiently interested in brass instruments to purchase patent rights to double-slide contrabass trombone, which they market as the Basso Profundo (Myers, Brasswind).