I have seen guns have their name struck off and replaced with a more fashionable one to up the price.
Chamber sleeving from 16-bore to 20-bore or 20-bore to 28-bore is a common practice and not forgery if declared.
I have come across the odd fake 'Purdey' at auction. Got no thanks for pointing one out!
When I was running AGL, an American dealer asked me to sleeve a gun invisibly than remove the 'sleeved' stamp. I refused and he cancelled the work order. Of course, it was just for the look, he wasn't tryig to fool anyone you understand
