I have 2 complete sets, albeit I have punched Ratz and Cracked added to the standard #32 and #38. Unpunched Ratz and Cracked are just to tough to get. Put a white background against then in the holder and called it a day. Have a couple of number variations #6 and #15 though. Again tough to get. Thinking the variations were printed the same time that Ratz and Cracked were in the production mix, so early on then pulled.
As a 1 year old kid in 1968, I punched them out. So did all my friends. So I can see how so few survived.
Also, I remember when the ads came out around 1971 that I was sorry disappointed with that format. So I've never relly collected them.
BillP