This is a wonderful "Piece of the Past". NEMCO appears to be one of those mystery marks that many of us in Jewelcollect are still researching. This Ring appears to be made in brass. It is an adjustable ring. The brass is all strirated with applied brass scrollwork. There are 4 6mm round turquoise stones and a center art glass stone in marbled shades of blue. It is a "knockout" on the index finger or the middle finger. Since it is adjustable, it is your choice. In fine condition. Circa 1940s-1950s. The Ring measures almost 1 1/2"L x 3/4"W.