The trumpet has “9-02 USM” and “837” scratched onto it. Model 72* ML #581837. It’s been 12+ years since the horn was played(marching band). It has a few dings and scratches. It needs a little tlc and someone to play it. I don’t know much about Stradivarius trumpets or trumpet care in general so it’ll be sold as is. Will answer any questionsNever known the front zipper to open.