I looked the gun over again for anything else that may help. The locks are marked, "A. Chapu Paris". The barels flats are marked "PT" with the symbol of a star above the initials. They are also a series of stamps that look like a shield with a crown above. The action bar bears similar marks with "A. Chamu" and "Paris". The barrels are marked, "JNO. HY. Andrew & Co LTD. TOLEDO Steel Works Sheffield N". The serial number is 3923.

Not much to go on, I know.

Thanks for all your help.
Michael