Ted, it sounds like a rare and valuable Tobin Live Pigeon Gun. Non auto safety and left firing first barrel is a serious clue. All you have to do now is write to the Tobins for a letter of provenance to avoid the critical skepticism of the "Nouveau Pigeon Gun Authorities" who don't believe that anyone ever ordered a gun for flyer shooting. Again, the "factory letter" will tell the tale and add value to your gun. Be sure to have a high quality oak frame ready for the letter when it comes.