First come, first served! Prima 4 Trumpet Mouthpiece

This is a vintage mouthpiece, size 4, from Prima.

[Playing Feel & Features]
When I actually played it, the sound seemed to start very clearly, possibly due to the steep drop angle from the rim edge. I felt the sound had good sustain. The rim is relatively flat and stable, holding the lips firmly, which made it feel less tiring even during long playing sessions.

The inner rim diameter was about the size of a Bach size 10.

[Shank Fit]
Due to the influence of the shank tip, it did not fit perfectly with the instruments I have, so it seems to depend on the compatibility with your instrument. When fitting it to your instrument, if you are looking for a perfect fit, you may need to polish or adjust it yourself. Please consider this before purchasing.

The inside of the cup was not smooth but had a special design with a two-tiered or three-tiered structure.

[Condition]
As this is a vintage item, there are scratches, plating peeling, and discoloration due to use.
Please check the photos.

There are no major dents or distortions that would interfere with playing, but as mentioned above, the shank fit is sold as-is.