The original art for some of Norman Saunders' fantastic Nutty Initials stickers are being auctioned on eBay right now. They were produced by Topps in 1967.
NORMAN SAUNDERS (1907 - 1989) was a prolific commercial artist who produced paintings for pulp magazines, paperbacks, men's adventure magazines, comic books, and trading cards. On occasion, he signed his work with his middle name, "Blaine." These distinctive characters were probably inspired by the work of Basil Wolverton. Painted fairly small, the piece as a whole measures 3.5" x 4.75, and there is some minor paint chipping in the black areas surrounding the monster, and glue residue on the reverse. Very good condition otherwise.Nutty Initials stickers (Via Anonymous Works)

Just finished a book called "A Man's World"- featured much Norman Saunders and Mort Kaufman "manly" pulp artwork.
Some of the art rivals that of Goya or other Romanticists
There is a site much of his work here.
normansaunders.com
WhoA! He also did the original "Mars Attacks" cards!
There's an amazing coffee table art book of the work of Norm Saunders here:
http://theillustratedpress.com
I got it recently and it's amazing!
Misread as 'digestive' characters rather than distinctive. I think both apply. Nifty.
http://www.wacky-packages.org/nutty-initials.htm