From French targe. In our post-war Castiles, poor childhood of our memories! it was a wooden cane or square in which the owner of the tavern or food store made notches to point out the legit. The cane or wood was in the hands of the buyer one half and the other in those of the legitator. Then some drank in the tavern on tarja, that is, the legit one, because, as they said, it was a inconvenience to carry many coins in his pocket and the bartender understood it.