Damascene earrings

Does anyone recognize the makers mark?

I bought them from that one seller where I bought lot of things years ago. She said this type of jewelry is called Toledo, I later googled it and found under name Damascene jewelry. Damascening is the art of inlaying different metals into one another—typically, gold or silver into a darkly oxidized steel background—to produce intricate patterns similar to niello. The technique originates in Damascus Syria and became truly popular in Western Europe at end of 30s mainly through the Spanish and Japanese damascene works like this one. On Spain it was usual that the gold was got using "Oro Fino" or pure fine gold over the brass. The Spanish damascene has usually two themes; floral naturalist and abstract geometric.

Similar earrings can be found for excample here:
https://gotvintageshops.wordpress.com/2015/09/21/a-2000-year-old-jewelry-tradition-damascene-jewelry/