Vtg brooch...stamping on back: designer? Age?

The brooch looks late 1950's - early 1960's. The stamping is part of the mold and doesn't tell much about who made it.

 

Anna,

The materials, style and design were all clues to dating the piece. There's a lot to learn about vintage jewelry and vintage costume jewelry. If the topic interests you, I recommend you visit your library and take out a few books on the subject. Or visit a bookstore and invest in a few basic books on the topic. I started collecting vintage costume jewelry awhile ago and have a large library that I refer to.

I presented a five-part workshop on vintage costume jewelry for the VFG in 2010. Here's a link to the part on the '50's and '60's:

https://forums.vintagefashionguild.org/threads/vintage-jewelry-workshop-part-v.35721/

You will see a few late '50's pieces in the presentation that have similar elements like the glued pearls and stones. These earrings come to mind:




You may want to read this section first, and then go back and read through it from the beginning.