Disco Ball Necklace and Earring Set - Numbered Vintage Set

This set was bought in Nanaimo, British Columbia, not sure what year these are from, however, I believe my Grandmother rarely if ever wore this set. There are no crystals missing, the disco ball has the black and pink crystals on both sides, the chain has crystals on the one side with silver tone showing on the other side. The chain is 24 inches long with an extra 2 inches with room to either make it adjustable or to hang from the clasp down the curve of the back. Earrings have the Pat. Number 166452 stamped on them.