WYETH PRINT what do you think

This was shown as one of a few pieces of art on a NEW YEARS day antique auction in Pa.Ive seen it in another venue and I wondered whether anyone has the ability to see wheter the signature is "In the stone" or is original. If its in the stone, the prints worth maybe 20 bucks. If its an original lithos, it could be valuable.
Here, you look at it . Its not numbered but Wyeth was often known to omit the numbering thing . And he often just wrote on his litho stones.
Anybody have a book of Wyeth prints?