Skip numbering from 1-36 indicates the test was partial (unissued nos: 8, 10, 12, 14, 16, 18, 19, 21, 23, 25, 27, 29) and the extreme lack of extant examples indicate it was unsuccessful. I've covered the set before, although as I explained in my prior post, it seems the date should be 1967 or later. 1966 is based upon the Topps COA's, these being sold by the Topps Vault, but they have been off on some of their dates before!
In case you don't remember, here is what an unfolded subject looks like:
Now that Topps Vault is selling production proofs of these, here is part of that Fold-a-roo, even though it's a proof:
The "We know someone who likes you" straight line would appear to apply to a gag that ends " because he's bats" so maybe these were cut wrong. For fun, here's the gag, right side up (the straight line is "I really like you a lot...)":
That was from an old Legendary Auction that seems to have had a mix of issued and unissued subjects.
Here's a couple more proofs:
Neat little set, tough little items!