Olds 9 derived trumpet mouthpiece 3D rendering

Model of a trumpet mouthpiece derived from a ca. 1960s-1970s Olds 9 cornet mouthpiece with a Vincent Bach 117 backbore. The original only appears in the Olds Educator Approved Musical Instrument Accessory Catalog, listed as the Post Horn mouthpiece. The Olds post horn itself isn't very common and was never pictured in catalogs, [though some examples exist](https://www.robbstewart.com/olds-mystery-horns). We included the exterior band in the style of Olds Mendez mouthpieces, with an exterior o