Yep, it's real! They come up in nice condition like that pretty frequently. You can tell repros by the size and the "Licensed by Mobil" information in the lower right corner area. There are different versions of the originals with changes in the wording at the top. I believe three, I can think of Ask For, Stop Here, and Ask Here For. The Ask Here For is the rarest I believe.
Whoever purchased eBay
item 160790241624 is going to regret it someday when it comes to his attention it is a reproduction. He should have done some research. Item number 251061990144 is another example of paying way too much for a repro.