Steve,
without a doubt, 100% "the Real McCoy" - more pictures on the upside down "S" - notice on the curved indian that the "S" is as one would think it would be, on the 2
8" X 12"s the "S"s are again upside down - I believe this would be a manufacture's overlook - I've had these signs a long time & I never noticed it until this subject came up..

Chuck,
you left out the "N", notice how it is blocked on each corner, what is noticeable is the lower right of this letter..

pictures of markings on base of flat 12" X 18" .. ... cool

IMG_3501[1].JPG IMG_3502[1].JPG IMG_3503[1].JPG IMG_3504[1].JPG

RANDY