This is a superb all original silver plated Dave Guardala King Curtis model tenor sax mouthpiece, serial number 3163. This handmade Guardala piece is in fantastic original condition. While it shows some tarnishing for its age, it has virtually no physical wear for its age. The tip and rails are all original and in perfect shape, and the bite plate doesn't have a mark on it. It measures at an 8* at .115".