That was my thought too. It also seems that the depth of the roll mark are uneven and when polished like Colt did up too the 1980's or so, parts of the roll marks would be faint or disappear.Colt also had more than one roll die at the time available. The dies tended to break more than wear out. Additionally, looks like the final polish was a little aggressive.
That's the beauty of collecting. There have been collectors for much longer than 70 years. Guns do get squirreled away, and many end up not being excessively handled or fired over long periods of time. I've got 100 year old guns in the same condition. Someone before me had them and preserved them. Guns like that tend to sell for more than the average "shooter" is willing to pay to have a gun to shoot. So, normally, the highest condition guns, when properly marketed, will be sold to "collectors" who continue to preserve for the next generation.Does anybody know the stories behind 70 year old guns that are virtually new?
I doubt they were bought as an investment and squirreled away because they were so common back then. Perhaps they were forgotten by the original owner or buried in a large collection. I am not doubting the condiction, but I do not understand how it happens.