Esso Southeast United States Road Map

I cannot find any date on this one, but I am sure that you enthusiasts out there will recognise the car and be able to date this road map! I think it will still be late 40's or early 50's which is the same as all of the others in the lot! Unfortunately, this is the one with damage, looks like a slug or snail has been sucking at it!! Must have been kept in an outside shed or similar!
Thank you!