I can see the faint resemblance to the Boucher Phrygian Cap, too, but the design doesn't look like anything I have ever seen by Boucher. The numbers might be the stone setter's number - since they are very different on each piece - or they might be Boucher's inventory numbers. Could you show the necklace closure and the backs showing how the pieces are put together. Also can you write down the exact numbers on each piece. If they are Boucher, they might be from during WWII and be Parisina made in Mexico, during a brief period when he moved there.
I think the Boucher numbers are in one of the Brunialti books so I will look them up.
Thanks!