Jim's sign is Black on back as was my SHELL ETHYL, mine wasn't marked Made In USA.
SHELL AIR double sided, GOLDEN SHELL MOTOR OIL rack sign Yellow Back.

Reproduction/Fantasy Cans
http://i124.photobucket.com/albums/p2/oldegaspump/AllCansMASTERTHUMBNAIL_zps4bfdbbc7.jpg
Rnd Can Re-lids