I have a Browning over and under I inherited from my grandfather. I'm trying to figure out the date it was manufactured, and know the worth is depreciated due to the rust. I will attach photos in case someone may be able to help me figure it out. The Browning patents no is 2203378-22386. The serial number is 54028S6. I believe I may have found the answer on the Browning date my gun site, but would like to see if anyone can confirm this. Thanks!