I have a .410 single shot that has been in my family for as long as anyone can remember. It is stamped Diamond Arms Company of St. Louis and (as far as I can tell) it is chambered for 2 3/4 inch shells. Has anyone else out there ever seen one of these guns? I am not looking to sell because it is a family piece but I would like to have an idea of when it could have been made. :?: