1927-1929 Chrysler hubcap View attachment 1885515 View attachment 1885516
Naw... it is definitely a super-rare "Script C" Confederate Cavalry rosette... or it would be, if it was for sale on Ebay. Oh, you say rosette's didn't have screw-threads... then it must be a super-rare Confederate Cavalry gunpowder-can lid. ;-)
Sorry... I'm getting downright curmudgeonly about how Ebay sellers jump to a highly profitably conclusion whenever they see an Old-English "Script" letter C on a piece of metal.