(Helen) I don't know the origins of these saxophones, but the are certainly not related to the Hohner Presidents of days gone by.
These Selmer knockoffs are most likely Asian in origin, and are interesting only because they carry the name Hohner. I've had people send me emails about them, and ask questions. My answers to these questions are always the same: Sorry, I can't help you. I don't know anything about these stencil horns.
You might notice that I'm posting a few horns in here that are actively for sale.
I'm doing that for a few folks that have been long-time contributors here.
The standard disclaimer applies: they're not my horns, I don't claim they're good or they're in perfect shape, etc.
If you want to list your horn, e-mail me at thesaxinfo-at-gmail.com and we might be able to work something out.