Vintage Trifari navy/white short necklace 70s-80s hallmark

This is a listing for a vintage 1970s or 1980s Trifari necklace. It features and enamel clasp with navy and white plastic beads. The clasp works and is stamped with a Trifari Hallmark that is most likely from the 1970s or 1980s. The necklace is wearable and in good condition there are some yellow stains on some of the white plastic. I have included pictures with the listing so you can see where the staining is. It measures 17 inches long and it is not adjustable.