vigillinus

One of the differences I can see is that if Rigby did it
you can sell the gun World Wide and it would shoot
whereas if the US company did it you could only sell it
in a few countries and certainly none of the markets where
9.3 x 74R Rigby's would be popular (UK, Europe etc).

I have a Sidelock Rigby which Paul Roberts (Rigby's) redid
into 375 Flanged Magnum.

It's a bit like all the 375 Flanged doubles that US gunsmiths made
into 375 Flanged Magnums as they were worth more - but only
in the US and I think those who are / were knowledgeable wouldn't
touch them anyway.

Just my HO.

500 Nitro