I decided to elaborate because it's moderately important for other folks that might come across this thread.
First, no Selmer New York horns were made by Selmer Paris. (
Selmer Paris is the company that made the Mark VI, etc.) All of the Selmer New York horns are
stencils. "Stencil" refers to a horn built by a manufacturer for another company or storefront that would literally take a stencil, put it on the horn's bell and engrave that pattern. In the case of
US-made stencils, the stenciled horn usually lacks some of the features of the horn it was stenciled from. As an example, Conn-made stencils always lack rolled tone holes.
The main reason why Selmer New York horns are included in the Conn section here is because Conn owned a large percentage of Selmer NY, so the
vast majority of Selmer New York horns are stencils of various Conn models.
Second, the vast majority of US-made
bass saxophones were made by Conn and Buescher. Holton made one for a little while and HN White (King) may have prototyped one. It's possible that Conn, Buescher, or HN White also made a Eb contrabass or two, but they would have been prototypes, only, and not for sale to the general public. (Conn sold the Eb contrabass Sarrusophone -- with optional single-reed mouthpiece -- as their Eb contrabass sax equivalent and I've seen that Buescher sold a variety of non-Buescher-badged Rothophones in their old catalogs.)
Here's the important part:
If someone buys a horn that is missing a part, it's important that you get another part that doesn't just "fit," but
matches. I can make parts "fit" with wire snips and a blowtorch. That doesn't mean it's going to work well or at all, but it'll fit. Adding a couple inches to the horn, especially in the neck, will really throw off intonation. The best recommendation I can give you, if you're missing parts, is to try and find a junker horn that's got a serial number close to that of your horn and strip parts from that. For stencils, you have the added bonus that you can try to figure out what your horn was stenciled from and use that as another source of parts. Note that I mentioned "around the same serial number." That's important because, say, Conn made a model called "New Wonder" for about 20 years. The horns changed dramatically during that time.
Here's a "YMMV" coda:
Most of what I've heard other people say about Selmer New York-branded horns is positive. That doesn't mean that all US-made stencils are good. I know of someone saying that when Buescher made stencils, they used older tooling. I've played a couple of Conn-made Cavaliers and they're horrid. However, this is only true for US-made stencils. As I mention above, a the only difference between most European-made stencils and the horns they're stenciled from is the engraving. However, there were companies that made good copies of other pro horns (Ditta Giglio, for instance) and some do seem to be of lower quality (Olds Parisian Ambassador).
The final thing to note is it's rather rare for one company to make all the stencils another company offered. My favorite example is Vega. Conn, Buescher, Holton, Martin, HN White, and probably EA Couturier and York had a stencil named "Vega."