Doug,

From looking at the cars it would sure seem to be mid to late 40's.

You might try calling Bob Rowe in Pioche, He has a shop adjacent to the Overland Hotel. Great guy and he is trying to get Pioche's Great History saved. Knows lots. He does not have Email, but phone is 775-962-5666. If you get to Pioche stop in and visit. Really fun to talk to.

Mark