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AnsonPSA will bring you the most $$ for that vintage, without a doubt. I'm partial to SGC myself but I don't deal too much in 60's cards. I do know that the prewar crowd tends to be more split over grading companies with this board heavily weighed towards SGC as well.
Vintage can be anything these days and everyone will have their own take. I like looking at each era as its' own vintage. Pre WWI, 20's, 30's-40's, 50-60's, etc..