Posted By:
Mark SteinbergOK Dan... I interpreted your post to read that it was labeled "1959".
I suppose the best way to date it, is to check for the presence of the Twins and Angels pennants. If they are not present, you know it is pre-1961. I think every example I've seen has the Twins and Angels included.
On the Nat'l League side, I have seen them with both the Astros and Colt .45s (about 50/50). This is one reason I think these were most prevalent between 1963 - 1965.