the American Warmblood
No well-known painter had those initials.
No, what you are seeing is not the mintmark, but the designer's initials (the "W" mintmark would not be used until the 1980s) the mintmark (if any) would be found on the back of the coin after the "E" in "ONE"
Ian Woan
Christopher Walken
Tiger Woods
mistletoe and wine
Made by W.& S. Blackinton Co. from Meriden, Connecticut, I believe. Markings include a horse (or unicorn's) head facing right, the initials "W & SB", the lion facing left. Probably also marked as EPC or EPN (electro-plated copper or nickel). If Electro plated, then not very valuable.
== A n s w e r ==None.
betty white
the w isn't a mint mark. it is actually an A and a W intertwined. it is the initials of the artist.
b w t c t s m w
'In the bleak mid winter'