I believe that the "Hogmouth" sobriquet was thought up by coin dealer Hans M. F. Schulman, probably in the 1950s, as a way to get a better price for these common coins. If you do a Google search, you quickly notice that ALL of the "Hogmouth" references are to coins; none are to any conventional biography of him, much less any Austrian mentions. "Hogmouth" appears in the Wikipedia article, but only in reference to a coin. Leopold I was never called this during his lifetime.

I was rated as high as 1892. Charlie Adkins may have made Master (2200). The best is Sid Belzburg (Canadian but has lived in NYC), a fairly good friend of Gary Kasparov. Steve Goldstein plays the game and collects chess medals. The Marshall Chess Club, when I was a member, had some medals among its memorabilia.

Not sure if I qualify, as I'm more of a numis-playing chessist. I'm a FIDE Master of chess, and something of a collector/investor in coins, though I am a life member of the ANA.

Eric Holcomb forwarded the E-Sylum link to me. He's a serious numismatist, club-level chess player, and businesses manager of Northwest Chess magazine, winner of the Best State Magazine award by the Chess Journalists of America in 2014 and 2015.

Recently I saw myself mentioned by Pete Smith in The E-Sylum as a former junior chess champion. I'd like to offer a bit of confirmation and clarification.

I played chess more-or-less casually until high school, when I started taking it more seriously. I was a two-time Indiana State Junior Blitz Chess Champion -- in "blitz chess" one must make all moves in five minutes or less and going over usually means a loss.

I won my championships in 2001 and 2002, at ages 15 and 16, and I briefly was in the Top 20 Juniors list of the now-defunct World Blitz Chess Association. At age 17, as a college freshman, I tried a last defense of my title, but I came in third and deservedly so. That was my last chess tournament; I didn't have the time or talent to compete at the senior level and I knew it, so I retired with my happy memories of chess intact.

I've attached a photo of me at age 30, wearing the medal I earned at 16. I'm also holding a coin from the Eric P. Newman collection as a token of a more enduring hobby love.

With regard to double struck buffalo nickels like the one in the ANA sale, here are a few more and there are likely others. Error coins have always been an unappreciated area of numismatics.