Weiss jewlery

Hello, I'm new to this forum so I hope my question is appropriate. I inherited this jewelry a few years back and just unpacked it after I moved. One set of earrings says Weiss on the back in block letters but nothing else is marked. However from the look and style they all seem to be made by the same company. I found limited information online. Can anyone educate me as to how to find out more details about this jewelry? Where it was made and when? Are their any books or websites I could reference? They're all so beautiful I'd like to learn more. My camera isn't very good. My apologies.