Posted By:
Joseph "Red Rock is the only soft drink beverage ever endorsed by Babe Ruth and posters were made of the endorsement in 1939. There is only one, perhaps two, original posters in existence today, and one is framed and mounted on the wall of its owner in Medina, Ohio."
If the sign is tin, it's a fantasy/repro item widely available. If it's paper stock, it's likely a fake or less likely an item that requires further investigation, given the pullquote above. from a Red Rock "fan site." If the poster is from near Medina, give me a shout.