Chris, Some years back while I was traveling through Vt.I found a shop on Rt.7. There was a Lefever in the rack I picked up. It was a 20ga. damascus gun. Plain Jane receiver with no other engraving on it except for the plates. Which looked just like yours. Right down to the Ithaca NY. in the straight ribbon. The rest of the gun was a bit tired and the asking price of $1100.00 was more than I had. There are not many of these things out there.
I only know of three others. So I have to ask. Are those plates for a 12ga.or smaller?