I saw the item about the Whitman Check List in last week's The E-Sylum. I too have one of these. The "for Sale by" area contains the rubber stamp of Lucky Coin Company in Easthampton, Massachusetts. I also have a plastic magnifier from Lucky Coin Co.

The back page of my checklist has "Form 9" printed on it. This version was apparently printed about 1964. For the current US coins, the latest dates printed on the list are for the 1965 coins and include listings for 1965-D coins---which of course were never minted as the mint did not place mintmarks on the 1965 coins. As my notes on the cover page indicate, I came up with my own system of coding, and for the coins that don't exist (the 1965-D pieces), I obliterated the listing with heavy ink markings.

I would have received this list in about 1968 (when I started collecting), and from the markings inside, it appears that I was still using it as late as 1973.

Lucky Coin Company used to advertise in Boys Life magazine----the monthly magazine of the Boy Scouts of America. I received the checklist and magnifier after replying to an ad. I also still have a Lucky Coin Co. fixed price list. The list is undated, but is likely from 1971.

To read the earlier E-Sylum article, see:
WAYNE'S NUMISMATIC DIARY: JUNE 7, 2020 : Whitman Coin Checklist(https://www.coinbooks.org/v23/esylum_v23n23a28.html)