Hi Mike
Kidding about what??
Its antique Baccarat and known as a rock or sand dune weight
I was slightly out on the date - Baccarat are thought to have started making them around 1880 and they continued until WW1.
And yes some of them rattle although neither of mine do.
HOWEVER dont think you have struck gold as these typically sell for just a fraction of the price of a "standard" Baqccarat antique weight.
Best regards
Derek