Coca-Cola Billboard

I recently contacted Coca-Cola direct and was referred on to Petretti’s Coca-Cola Collectibles Price Guide. However, my item is not listed in this guide at all. I have attempted to research on the internet and have found no information on my item . I am enclosing an attachment with a picture of my Billboard in jpeg format. The billboard advertisement is from 1941 and has a man and woman on the right side of the billbaord, made of metal with the initials A M in the left hand corner along with the number 12. Any info you may have regarding this please let me know. Thank you in advance.

Good