Contessa 1/20 K Gold Filled Wave Leaf Brooch Clip On Earring Set Vtg Jewelry

Vintage brooch and clip-on earring set in a trifold leaf or wave pattern. A very pretty, elegant set that is 1/20 karat gold filled. Excellent condition, There is a 5-digit number marked on the back of each piece but I don't know what it refers to. They are in their original box branded Contessa. The box has some discoloration as shown.