3-Piece Giardinelli Trumpet Mouthpiece where the shank was seized to the bowl section. Whacked it with a rawhide; wrapped it in silicone tape and tried to free it with a 2 pairs of pliers; froze it, then heated the bowl…nada….finally whacked it a few more times with the rawhide, grabbed it wearing 2 heavy rubber gloves, and it popped free. Cleaned the threads and reassembled.
Joel Smith Music 
What size (model number) is it? I can’t see in your pictures. Thanks!
No clue, I probably never even looked at the model.