Brass Lacquered Baritone/Bass/Sousaphone Lyre from APM.

American Plating & Manufacturing Company (APM), based in Chicago, IL is one of the largest domestic manufacturers of band instrument parts and accessories. Established in 1902, American Plating is a world-class manufacturer with customers in over a dozen countries. APM manufactures ligatures, lyres for marching bands, woodwind mouthpiece kits, trumpet/trombone brass mouthpieces as well as numerous other accessories for the music industry.