Vintage Harley Davidson Hawg Parking Only Sign

Older harley sign. It looks like someone made the front plastic piece and back metal piece to protect the sign itself. I think the sign itself is plastic, but the front looks like plexiGlass and the back is metal. Has some weight to it. Someone definitely had it hanging up on a Pole i would assume. Can't find any signs that are exactly like this one. The little white sticker on the front Is pretty neat as well. Definitely has some aging and wear. Measures 18x12. Please take a look at all the pictures and feel free to ask any questions.Thank you