Vtg Barro Negro Vase by Doña Rosa Signed Black Pottery Mexican Folk Coyotepec

Beautiful vintage piece of signed Mexican black pottery by Dona Rosa 1900-1980. Piece is a tilted vase with some textured accents, black shiny pottery. Piece is signed and has the #1 on it. I don't know if that means the first piece of this kind, I researched and could not find an answer. this rare beauty stands (at a tilt) approximately 4 inches tall. There are no cracks, there are dings and scratches which I don't know if they occurred during production or after. Piece is cold, almost as if it was stone. Sold as shown, please see all photos.