This is a ring dating from the 1920's or 1930's. The construction of the underside with its engraving establishes the age. The mark, on the inside of the band, is a U with arrows pointing to it. The ring has a pretty design, engraved and set with marcasites to add sparkle. There is a black onyx cabochon prong-set in the center. The top of the ring is 1 1/8" X 3/4." The ring is a size 4 1/2. It is in excellent original condition with no scratches or missing marcasites.