Cup diameter is smaller than No. 1G, but still very large and deep, with the sonority preferred by the modern American school.
Vincent Bach was a rare combination of artist and engineer. A mechanical genius and acclaimed trumpet soloist, his instruments and mouthpieces are used today in every major studio and orchestra in the world. Bach personally designed the tools and composed the plans that continue to set the high standards for making all Bach products today.
Genuine Vincent Bach mouthpieces are the best available in the world. Bach mouthpieces are designed to meet every conceivable playing need and have for nearly three quarters of a century. A Bach mouthpiece will make a poor instrument play well, a good instrument play better. Volume and excellent intonation, ease of response in the high and low register, rich, uniform timbre throughout the range, and resistancec calculated to increase the player's endurance - these characteristics explain why the best professional artists choose Bach.
Because Bach mouthpieces are the accepted standard of quality, their numbers are familiar everywhere as designations for certain models and types. Although Bach mouthpieces have often been copied, they have never been equaled for precision, tuning, and playing characteristics. Only genuine Bach mouthpieces bear the full inscription Vincent Bach with the model number listed.