Hi, my name is*****'m a certified appraiser, and I'd be happy to help.
At the time of the movie's release, there was a promo and many, many trombones were created and given away. The question is whether this is one of the ones from the movie, or one of the ones from the promo release.
Could you give me the ID number? Also, is there a letter or any paperwork that came with it?