I posted a separate thread looking for input on the SKB 375 euphonium case. I'm posting this topic as a separate thread in order to call clearer attention to the key point: apparently the Prestige 2052 does not fit this case. I see nothing defective in the case I bought, but my son's 2052 does not fit. The top and bottom bows do not both fit the recesses provided for them, so the horn rides too high in the lower half of case and the lid will not close without applying excessive force--perhaps not at all. I imagine the velour covering could be cut to expose what I imagine is a styrofoam insert, which could then be trimmed to allow the horn to fit. But since the case is brand new, I don't think we want to modify it at the risk of ruining it without ever getting a decent fit.
I really have not examined the situation closely enough to get a good read on the details (my son was handling the horn, which is his). It's just clear that the horn does not fit. I've contacted both SKB and also the dealer from which I purchased the case (Music 123). Surprisingly to me, neither apparently has much of an idea of exactly which models fit the case and which do not. The SKB website lists only 4 horns that fit the case: Willson 2950, Anthem A-5000, and the Yamahas, 201 and 321. [Error correction: checking later, I see that the listed Yamahas are the 321 and the 642.] Their wording, though, is "The following products have been checked by an SKB Product Specialist and do fit in the Universal Euphonium Case." So the list is clearly not intended to be comprehensive; I'm just surprised that they don't list many more horns, since they're calling the case Universal. I'm sure that many more horns really do fit; for example, my Mack Brass 4-valve compensator fits fine.
Music123 told me only that they checked the manufacturer's web site and "it does not appear that the Besson Prestige is listed as one of the products that will fit the case." So no help there. I've seen a good bit of discussion of this case on this site, and I don't recall anyone mentioning that some horns don't fit (I'm sure the Miraphone 5050 is too big, but I think that model is pretty well known as being oversized, so I can see how it would escape comment). I gather, then, that this case must be fine with quite a variety of horns.
By the way, someone will probably ask whether I was trying to fit the Prestige into the case with its belly guard on. No, the belly guard was not on. Whether the mounting brackets for the belly guard are the problem is an interesting question that just now crosses my mind. As I mentioned above, my son was handling the horn and the case; I mostly watched, and handled it very little. He was in a hurry and won't be back with the horn until this weekend. At that point, I'll get a better read on details--if I can convince him to let me touch his horn. The fact that I allowed my horn to get a little dent has convinced him that it's not safe for me to touch his. :-) So I will post again in a few days with further information.
Anyone interested in buying a brand new SKB 375 can check the for-sale listings.
Randy