I found this sign at a flea market mall. It’s 8.75″ in diameter, baked enamel finish and 10.75 ounces in weight. It has been dinged a bit and I’m not under any illusion that it’s an antique. I believe the company that produced these signs is no longer making them. “Too expensive”, I read.
I’m not having any luck finding a similar sign yet. I may have to (alert! 1960s TV series reference) “Wire Paladin, San Francisco”.