Hi Kevin,
I'm the fellow who has the 23-39 Buick, with the gas cap in the photos. When Hugh saw my photos, he said it looked like a cap from a Model A . I was convinced when he said so, and with your note - I'm more sure. I have no idea why, way back in my car's history, somebody would change from the original cap with the mickey mouse ears, unless it was lost somewhere along the way. I'd like to find a correct one. Maybe in time. Thanks for your post and photos.
Joe