36" Coke button

I've owned 36" Coke button this since 1979. Looks like real porcelain. Asked if it was a repop and he said it would be too expensive to make a reproduction. BUT, it doesn't have any AM# or Patent registration on the front. The paint on the coke bottle has some texture to it. and the bottle slightly shows through the white lettering. A few dings mostly by the mounting holes. Can one of you coke experts tell me if this is real?
Thanks