I was told at the time of purchase that this one is from around 1959, I was over anxious and paid what the asking price was. Not sure of it's actual value but am sure it's a keeper. It has been to the range and did not disappoint, actually surprised me by being more reliable that the S&W M-4516-1 I took with me to the range. I'm aware that one is single action only and the other is double action and then single action but the difference seems strange to me as I wasn't sure I was in control using the M-4516-1. My experience with semi-auto pistols is very limited as I was weened on the revolver so it surely could be operator error but the Colt was dependable and gave me confidence where the S&W did not. I'm not actually sure what I'm asking but am very interested in any experiences you might wish to share, always appreciate views from other folks!