Bob Reeves Classical Line 1C GP Trumpet Mouthpiece This Classical Line model was developed over five years, after consulting with many American professionals who sought the good old vintage sound. It's so well-made that some players have switched to it from Mt. Vernon mouthpieces. It's currently a hot topic among classical musicians in America. While the rim and cup remain largely the same, the backbore and shape are unique, the result of pursuing a vintage sound. Instead of producing many variations, the price is also a bargain, about half that of the standard model. Unlike the standard model, it is a one-piece construction.