J Tobin _ _ _ 3 ???

[Bigmon]

Ran acrosswhat looks to be a pretty high quality rifle today.  Almost bought it but just too much not knowing what it really is.
Looked to be about a 38" or som, 50 cal swamped barrel transitional style rifle, a little too fancy for my taste?
The rear sight had been moved fprward sometime in it's life and was inlet over what I believe to be the makers name on the topflat.
What is visable appears to be " J TOBIN (then the rear sight) 3".
Does this tell anybody anything?  Is or was there a pretty good builder that might match up to what can be read??
The wood / metal fits on this gun were really well done.  It was a great pc of wood and a big Germanic lock, looked like a Davis?
I got the guys number if it would be worth persueing?
Thanks to all

[oldtravler61]

  Any picture's...might help the pro's on here help identify it.

[Bigmon]

I had no way to get any photos at the show.
Perhaps I can call the owner and have him send me a few and I could post.
I might be of interest to some on here.
It is a high quality build, IMO.