(Pete) I came across this maker the other day. I think it's very probable that this is a stencil -- it's very close to a Max or Julius Keilwerth horn -- but there are enough differences for me to go ahead and create a new category.
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.