Re: Hirum K Elles Elkhart USA Alto
That is an odd saxophone.
Is there any numbers or dates around the lower thumb rest?
I do not recognize the overal layout as a major producer.
This is a definite Stencil. The name on the bell is who paid a manufaturer to produce a number of instruments with their name "stenciled" on it, not the manufacturer. That is what is know as a stencil. It is Not necessarily American made either. With that in mind, there are not many with that exact engraving.
More info needed.