Vintage Large Antique Gold “Mary” Coin Pendant Necklace

Rare! I can’t locate any other like necklaces for research or reference. This is a rather large pendant. Definitely handcrafted. Appears to be a coin at the center. Coin Cain be seen through the back but no idea where it came from. Extremely nice. Tiny bit of tarnishing at top…last photo. 3/16” x 18” antique gold toned chain. Pendant is also antique gold toned. It measures 1/8” thick x 2-1/2”. CC94