Vintage Watermelon Rivoli Cufflinks Silver Tone Setting

This is an attractive pair of watermelon rivoli cufflinks made with a silver toned metal setting. I believe that the rivoli stones are of Austrian origin.
There are no makers marks, but these are quite heavy, a sign of very good quality. They are in very good condition.
This is a very nice pair of vintage watermelon rivoli cufflinks - attractive colour!