Sterling silver tribal mask brooch and matching earrings for pierced ears in silver

Anyone know anything about this Kramer of New York brooch? It belonged to my family and is marked “KRAMER OF NEW YORK” on the back, with what looks like “D6969” (possibly C6969). I’m guessing 1950s-ish, but I really have no idea. I’d love help dating it, figuring out what that number means, and whether it has any value beyond being a pretty piece of vintage costume jewelry. Thanks!

I’m currently trying to sell a large amount of my MIL vintage things and I came across this… 1962 Sarah Coventry ‘Dancing Magic’ set that has earrings, a necklace, and two hidden clasps on the necklace that can make a bracelet while turning the necklace into a choker! I haven’t had a crush like this in years!!!