Parker Barrel Modified?

[Richard McWilliams]

I acquired a GH Parker Ser NO 90324 from 1899. I received the Parker letter indicating it originally had a Damascus barrel. Its current barrel seems odd to me and I wanted to reach out to see if anyone can tell me what I have. The chamber portion of the barrels appears to be Damascus but there is a blued line at the end of the chamber and the rest of the barrel appears to be simply blued steel. Was this modified at some point by Parker or someone else? The Barrel is serial number matching to the receiver. Also, the barrel rib only says "PARKER BROS. MAKERS. MERIDEN CT. U.S.A." and nothing else, which I have not seen before as all the others I have seen have the type of steel stamped at the end. Any idea what I have here? I'm attaching some photos. Thank you, Richard.