Man thats though! Maybe a small price sign? I was able too find A &M club of San Francisco that may date too the early 60s/70s but that is just a shot in the dark! I really don't get what the trademark is .. are they trademarking "A m" or "A m San Francisco"? a search in the online Trademark database turns up nothing but I doubt it would turn up something from back in the mid too early 20th century on an online trademark search but if there is away too look up very old trademarks then it should come up somewhere (more of less in a library in San Francisco)