As many upgrades as I have seen over the years, the only ones that would fool anyone but an idiot are the Del Grego-Runge upgrades and the vast majority of those have the Del Grego-Runge signatures engraved on the gun. If you have one you would like to have documented, feel free to contact me and I will locate the signatures for you. I have never seen an identified upgrade that would fool a serious collector that was not done by Robert Runge. Now that the records are available, it is even more difficult to put one over on a serious student of the brand.
