A client purchased a high grade, pre-war Sauer boxlock from a very famous dealer in the North East (I won't say who but their name has an ampersand in it) and had it sent here for a pre-purchase inspection.
This is what I found:
When confronted, they simply claimed not to have seen it. Naturally, the photos in their ad were, shall we say, strategically taken.
As always, caveat emptor.