Who painted this pin-up?

The Pin-up Files has been asked to help identitfy this beautiful pin-up painting. It is unsigned, we do not recognize it and cannot place the style. It looks like it should be 1940s or 1950s and we are told it's condition indicates it could come from that period.

We love this painting and we'd love to identify the artist! Can you help?

Artist unknown
Subject to copyright

We will pass on any suggestions you may have...

Who painted this pin-up?

Can anyone help with this email and photo sent to The Pin-up Files by "Ron" (who also goes by the name of "Professor Marvel")?

Email:

"I have had this original guache and pencil pin up since the sixties. I acquired it in Detroit and believe it was part of a pin up calendar done for Kelsey-Hayes Corp in the fifties. It is approximately ten by fourteen inches and done on artist illustration board. It is not signed. Any ideas who may have painted this pin up?"
Ron

Artist unknown
Subject to copyright

We love this picture and we'd love to identify the artist of this pin up girl painting - both Gil Elvgren and Alberto Vargas have been suggested but both seem spurious.

We'll be happy to pass on your suggestions to the good professor...