This is a vintage, open work, stylized, sterling leaf pin by John Lauritzen, Denmark. The pin fastens with an open catch and it has a flange hinge. John Lauritzen produced between 1955 and 1981. In great vintage condition with a good patina. I have not cleaned it as I prefer to leave it up to you to decide to leave as is or clean it. Measures; 1.5" x 1.5"