ANTIQUE ART DECO GREEN ENAMEL BLUE STONE MENS CUFF LINK.  GOOD CONDITION, NEEDS TO BE CLEANED.  NOT SURE IF IT IS STERLING SILVER.  MARKED ON THE BACK "KUM A PART" .   FROM SMOKE & PET FREE ENVIRONMENT.  PLEASE BE SURE TO TAKE A LOOK AT MY OTHER AUCTIONS FOR MORE VINTAGE JEWELRY.   THANK  YOU!