I'm no expert here but it looks original to me

Butt plate looks original to me--same as on my 16 ga O grade hammer gun w/ twist barrels

Judging by the amount of wear to the rest of the gun I would say the butt plate is a replacement - look at the toe where it was shaped to fit the stock.





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So after all this conversation what grade is this gun and what is it's value in the current market? It is listed in the serialization book as a Grade 0 with PT barrels. The locks have zig-zag engraving found on late Grade 0 hammer guns and Grade 1 hammer guns. The water table is stamped P which would indicate a Grade 1 hammer gun. Could it be that the only way the order for 34" barrels could be satisfied was to provide plain twist barrels on a Grade 1 gun?

Good eye Dean...The rest of the plate looks untouched. Could those marks be from sliding the gun into and out of something?
Here are some close-ups

IMO the toe of the stock was badly chipped and the butt plate was badly fractured necessitating this amateur repair with a replacement butt plate.





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The fact that it is stamped with a P, all else is inconsequential. It is a P or Grade 1.





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My guess is that there were no more 34" barrels in Laminated Steel necessitating the use of Twist Steel. The vast majority of hammerless Grade 1 guns of that era also had Twist Steel, leading us to believe Laminated Steel barrels were no longer available.





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That is why I asked the Question The plate still looks over sized where it meets the comb and you can almost see some file marks in the wood ! Still would love to swing them barrels I question if stock has been trimmed a bit

Austin Hogan's old skeet gun, #104,043, was also one of the rare P Grade marked hammer guns. It is a #3 frame, 32", 12 gauge, Twist Steel gun that does not appear in the Serialization Book. It appears that P Grade marked hammer guns appeared in a very narrow period of Parker production. The next gun in the SB is also a 34" hammer gun!