Steven, the only engraving I can see in your photos is the floor plate. That style is more British than Kornbrath guns I have seen and owned. But, I have not seen them all. As a general rule with auction descriptions, one must consider that verifying is prudent. In the last year or so, auctions have presented shotguns whose estimates total in the high six figures, but we're found to be bogus in their descriptions. I am sure your comment about calling me for information was made in jest. But,feel free to do so if you desire.
I am in India for another month, so I am away from my files. Please do give my regards to Sam Welch in Vegas, and do publish his opinion. I am sorry to miss Vegas this year for the first time in several decades, but hope you have an enjoyable trip.