Thank you for viewing. Bach 7C Trombone and Euphonium Mouthpiece CORP Rare item. Based on my personal observation, this is likely a 1970s-era "deep period" Bach mouthpiece from CORP., with a wide gap between the CORP. engraving and the 12C marking. Overall, it's in very good condition, but there are some minor scratches, and the tip of the shank is slightly dented. Repair is likely possible. Considering its age, the appearance is quite good, but please understand that this is a used item before purchasing. I have cleaned and polished it as thoroughly as possible, but there is some evidence of use. It comes with the original box and plastic, and the original purchase price is still on the box (lol). As a vintage item, its value has increased. For small bore trombones Small shank