I have an old Browning 22 semi automatic rifle that is just like the one my grandpa taught my brother and I to shoot with. My brother has had it for many years. The original rifle was stolen from our home in the mid 1980s. My brother no longer feels safe having firearms in his house with his Huntington's disease and asked if I would like to keep it. Of course, I was tickled pink to keep it. I haven't had time to break it down for a cleaning, but upon inspection, I only found a possible serial number on the butt plate. Is this the correct and only location? It seems to be in unlikely place, considering one could simply remove or change butt plates. Sorry for the poor photos, I will try and get better ones in the morning.