One bbl set has over stamped ser#(at least the 2 digits you can see). The '(-Fluid Steel) Krupp Essen-' is hand cut on that one also,,looks roll stamped on the other.
That is one way to get a 2-bbl set.

If thats Rudy's work,,it must have been a Monday after a very rough weekend.
The bbl engraving may have been a 2 stage process. It just has the look of it to me.
First the scroll near the breech was added along with the muzzle scroll.
Then as an after thought , Princess SummerFallWinterSpring was added along with the game animals to stretch out the bbl engraving even more. More is better..
All very un-RJK looking IMO. But that's just me.

Didn't remove all the roll die marked info on the action flats.
It doesn't say it's a factory piece though,,so no special handling I guess.,, not picked off the line before normal roll markings added, ect. Just a basement after-hours job at home.

Jeweled action flats,,, and then case colored?,,nice touch.
Maybe they just forgot to jewel on the bbl flats & lugs too. We don't know about the forend as there are no pics.

The Gough engraving looks credible,,but alot of his standard Fox work is so crude (trying to be polite),, it's not a difficult one for the forgery crowd.
I've usually seen his signiture on the trigger plate around the hole where the guard screws into (Fox and Parker). Same with his father.
But anything is possible.
Just some thoughts and observations.
Get your check books out,,,,

As the ad says,,,It's Monumental,,