Very old Vintage double hoop silver tone brooch

Very old Vintage double hoop silver tone brooch. I believe it is silver but unsure. Is tarnished - leaving it up to next owner whether to clean it because I like the tarnished look personally. Very sturdy. Please see pictures for condition and details. Thanks for looking! related tags: very old metal 1970s 1960s pin lapel sweater weather brooch jewelry vintage retro groovy curvy curve hoop silver gold pewter antique estate