I have a Browning 16ga A5 that was brought in today that I'm trying to determine value on. By serial number, it's a 1951 Belgian made, with serial number X584xxx. It is not marked "Sweet Sixteen", but my understanding is that it could be a postwar unmarked sweet sixteen. Condition wise, it's in really nice shape with some bluing loss on the the top and bottom tang. The round knob stock has seen field use, but isn't terrible. There is a chip out of the solid plastic butt plate. The forearm is in relatively the same condition as the stock. Not pristine, but not bad. The customer is a 93 year old man, and I'd really like for him to be able to get what the gun is worth. Any help would be much appreciated.