Where is the serial number located on a WM Parkhurst double barrel 12 gauge shotgun with Belgian steel barrels?

By taking the barrel of the stock and looking where your barrel meet the firing pins, if you are lucky you will see a number. I have found in my research some of these little treasures did not have a heavy stamped number. Don't get fooled, these numbers are not Item numbers, This was actually a family genealogy number which kept track of the families during WW1. Some of this information has been lost throughout history, However this Inexpensive, cheaply made, Not worth much, Haaaaha, My treasure still bares my Great G Grandfather's marks of Valor as he pushed through Sicily to make sure my Grandpa a boy at that time was on the Safe boat to America, while Germany was invading Italy. Awesome gun saved lives. And the tails of the way they packed those shells. I've seen it fired once when I was little NO GIRL GUN. No amount of money can match this History I'll Keep it for the next 120 Years.