Well, let's talk about who didn't make it. That'd definitely be Kohlert. Why? The serial number is too low for VKS -- it'd be a horn made in 1902 -- and the Kohlert model would be from 1952, a
Winnenden and that model is just too dissimilar. All the VKS stencils I've seen have a full VKS serial number.
I investigated the Orpheum horns, as they seem to be mentioned with Telecaster saxophones (specifically by Mike Furbee who sent me
pictures of his horn a long time ago) and I can appreciate the similarities, but the name "Orpheum" was used on a variety of other horns, too, like this
Italian made horn.
Now, it's *possible* it's an Amati, but I somewhat doubt it because the serial number would indicate a relatively new Amati: at
3xxx they were producing Tonekings and at
10xxx (or earlier) they had the Classic Super (the linked pic is of a Keing Lemaire stencil).
I'd love to say "Dorfler and Jurka", but everyone seems to indicate that they didn't make horns until the 1950's and this horn looks earlier than that.
I'm thinking it's either actually made by Keilwerth or it's a Keilwerth body. It'd be "made" by Keilwerth if it has the "Best in the World" stamp, if not, it may be same folks that made the stecil I'll mention in a moment.
* The serial number would be sufficiently early -- or not have to matter, at all.
*
A s/n 9xxx horn looks mighty close to the Telecaster and we know that
Keilwerth bodied horns were available with slightly different keywork.
Points to compare have to be:
* Age.
* G# cluster.
* Low C key (rather unique design).
* Available rolled tone holes.
No, it's not an exact match, but I think it's close enough.