I believe you nailed it...That is an A.D.P. pipe. It looks shortened, maybe a break?
I like the beading around the bowl. Nice pipe.Picked this up.I think it's by Adolph Posener. View attachment 28629 Not the biggest pipe in the world. but being 130 years old, I think it has survived in pretty good nick.
What caught my eye ways the banding round the bowl, I really like that style.
Don't do it! Speaking from experience it becomes addictive!A very cool piece of history. I'd love to get a pipe over 100 years old!