The best thing to do Paul is look up the German maker in google it should bring up different types of designs I’ve a few different ones if you look at the back of them rather than just the front there should be some tell tale signs.
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German Brooch by Otto Muller by: Anonymous
Your brooch was made by Otto Muller and is German in the Kaufbeuren area and is highly collectible
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Brooch stamped 59? by: Paul
I also have a vintage round beaded brooch of good quality marked on back 59? Also cannot make this out originally I thought was a makers pat.number but not so sure now as your brooch is completely different in style.
