1970’s Vintage 12K G.F. Cross Necklace and Earrings Set

Rare, Preowned, One Owner (Me), Vintage. Please see pictures to aid in description. I have had these for 45+ years, barely worn, just never reach for them. Back of cross reads 1/20 12K G.F. (pic #5). I cannot see what’s in the star on the back of the cross, but it is likely a stamp of the brand. Picture #6 shows backs of all 3 pieces. Some natural patina on front and back of cross. The pictures make the color look like it could be peeling, but it is not; it is just a different coloring patina in a few small areas as shown in video. Original dainty necklace (clasp also reads 1/20 “something”…I am unable to see). Pierced Earrings do not have original backs (lost over the years), and are not marked with gold content that I can see, but were purchased with the necklace. You will receive the set in the box shown in video and last picture which is not the original box. Really beautiful and unique Vintage set with heart shaped details. Love the raised tiny cross in the center with the slightly different finish so it stands out even more.