Thanks for the reply heinz.
My wallet got a little lighter today and the Tingle rifle followed me home.
It is an interesting rifle. I hope someone can point me toward more information regarding Tingle and his rifles (dates of manufacture, numbers made, etc,etc).
My rifle is numbered 16XX. It is wearing a 45 caliber barrel (not marked by any maker) and also has a 32 caliber Douglas that was made for it.