Hey,
When I googled it, I found one mention somewhere here on TM from someone who had one. Therefore, I don't think it's custom.
It's also got a leadpipe that's brass until just after the cluster, than changes to rose brass. The valves were really quite sticky when I found it, so I was only able to play octaves and all that stuff. It's currently in the vat getting cleaned. The leadpipe was absolutely filthy. The bell flare is very gradual, somewhat similar to a Committee, I think. A small bell, too.
The engraving does say
Martin
H a n d c r a f t
The New Master
Elkhart
Ind
The 1st, 2nd, and 3rd valve slides are stuck, but should be loosened up.
I'll try to post some pics when I get around to it. It might be going to my tech tommmorow, as I'm picking up some horns and might get it de-dented while I'm there.
Thanks for the input