Bach 5B cup section threaded with Standard Bach threads, 24 Throat, stock Back Bore (Bach 5b's have a #7 "Schmidt" back bore) which provides a darker, richer tone.
With modifications, this would be over $110 new!
Threading and backbore were handled by Karl Hammond of Hammond Designs
Trumpets & Mouthpieces are for sale by Eric Hennies c/o AlphaVariable
*Karl charges $50 for threading, $10 for throat, $10 for shipping, plus the cost of a mouthpiece.