Vintage Hickok Cufflinks Set

Color: black and silver Brand: Hickok Purchased from local estate sale. They are signed “Hickok” I’m not sure what they are made of. I don’t test anything at all. Needs cleaned. I haven’t even wiped them off. May or may not look differently once cleaned. Items do have normal, minor wear. Nothing broken. All flaws or imperfections are shown in photos. Please see photos as they are part of the description. Ships as soon as payment is received. All offers welcome! Thanks for looking!