|The clasp and style of findings are very Miriam Haskell.|
The openwork disk bead in the center can be seen in this similar collection of pendants from an online auction:
|Note the openwork bead second from the left in the bottom row.|
Three similar pendants were combined in another 1930s necklace with a chain similar to Suzanne's necklace.
UPDATE: a recent eBay sale featured one of these Haskell-attributed necklaces with a charm cap similar to the one in Maisonnette's, plus other interesting cloisonne beads, including 4-toed dragons: