Thank you, Oskar! I used to have a number of good information sites bookmarked, but lost all of it with an unfortunate 'puter situation and the back up copy wasn't usable either. Shame on me for not having been more thorough and having the back up backed up. Anyway, that information is what I wished, gun was made between '59~'68. Perfect. And in line w/my thoughts about its time of mfg.