Regarding your request for more information about the Tell-A-Coin pricing tool in last week's issue, you must have known that I couldn't let such a challenge gounanswered.

I have both of the Tell-A-Coin wheels. These are double sided, with one having Lincoln Cents and Buffalo Nickels and the other having Mercury Dimes and Standing LibertyQuarters. Images of both wheels are attached, along with a 1958 ad from The Numismatist for this product.

As for the Disc-A-Log Company, I was not able to find more about that. It doesn't seem to have advertised directly, at least not in numismatic publications.

To read the earlier E-Sylum article, see:
NEWMAN PORTAL ADDS TELL-A-COIN GUIDE WHEEL (https://www.coinbooks.org/v22/esylum_v22n44a06.html)