USED Connstellation 9C-N Gold-plated Trumpet Mouthpiece

Used--Good. Some plating wear on the bottom portion of the shank: note that the shank portion is not originally gold-plated by the manufacturer. Some pitting in the finish; signs of wear. 

The "B" cup is the smaller cup, the "C" cup is the larger cup. The difference is that in the "C" cup the lower portion of the cup has been enlarged. The "N" rim designates a smaller inner rim radius (sharper bite) and also a slightly narrower rim width. Hence "N" for "Narrow".