I have a pair of earrings that we bought in Germany, this and the "Bauhaus" looking is why we suposse they are German.

They are marked 925 and something as a "R" in a leave (?) or a circle. They have a cabochon made of Garnet.




Any help would be welcome, specially if the mark would belong to a maker working on the 20's-30's.
Thanks in advance.