Osmun Music - Brass Instruments, Accessories, Repairs Osmun Horn Mouthpiece, Schmid horn, Otto horns, Finke horn, Hoyer horns, Atkinson horn, Bach trumpet, Schilke trumpet, Bach mouthpiece, Curry mouthpiece, Osmun piccolo mouthpipe, Cardo case, flight case, mute, stopping, leadpipe, c trumpet, blueprinting, trumpet repair, horn repair, french horn repair, mouthpiece modification, screw rim, threading, backbore, lead pipe, mouth pipe, horn, french horn, french horn mouthpiece, horn mouthpiece, boston, MA, Massachusetts, new England, Acton Osmun Music sells fine horns and trumpets and manufactures a line of screw rim horn mouthpieces. We repair all brass instruments.