I have what I believe to be an"'early" Walker made by S Marco in Italy. It only has the PN stamping and the crossed swords w/circled Star"...I can find NO others..can you help me date this brute..? It is factory engraved ??. The cyl. scene has lettering of W L Ormsby etc. within the border engraving that I cannot read the rest. I am perplexed on this dating and am curious as to whether S Marco did the engraving on the frame/T'guard/backstrap etc..??