From 1977, this advertisement shows the full breadth of Bach's mouthpiece line at the time. The stressed 237 standard models for users to choose from. At the time period, there were very few companies that had such a full, and complete mouthpiece product line.

Of interest, note the inquiries went to Lloyd Fillio who was known as the "Chief Bach Brass Technician". He joined Selmer, Bch in 1960, and retired in 1982.