I only have one a T-series, made in 68. And one is one more than the number of rounds it has had run through it since it left the factory. It has the tiniest bit of edge wear at the front of the slide ( probably from taking it out of the case to be admired ) and it grades out as a 99% gun. It was given to me as a gift from the man who bought it new and its provenance is unquestioned. I have five original Browning mags he ordered and received with the gun. I think he was going to use it as a carry gun until he realized that the sights and safety weren't the best. That's putting it charitably. Being a collector himself, he just put the gun in the safe, realizing it would increase in value over time.
And, being a collector myself, I'll do the same.