unsigned.
This Piece originally Came From Phil R. Swanson.
Phil R. Swanson was a WWII Era Concept Artist while he Served in WWII.
After that time in the 50's and 60's he was a designer for several Companies which involved making Art Concept pieces as part of the process.
He also Designed floats for the Hamm's Company and others along with the Concept art needed to get approval for the projects.
Swanson was the Owner of Project Associates Pasadena See Photo