VINTAGE 1970s Silver Tiger necklace

Vintage 1970s Silver Tone Necklace with Tiger engraved , 3 Separate Plates joined . I have had this for 20 years at least I have never had to Polish it or clean it . It’s not tarnished I think it maybe Stainless Steel ? Not sure of the metal . Shepard Hook clasp . I do not know the metal and have no way to test . The metal is silver with no wear at all , it’s in excellent vintage condition.