antique writing desk blotter corners, early 1900s vintage Austria hand painted china

Set of four hand painted china corners to hold a blotting paper on a desk or writing table - these are marked Austria, probably early 1900s vintage.

They measure 3 1/2" along the sides, and are made to just lie atop of the paper. They don't fit around the paper top and bottom. They have been used, and the unglazed bottoms are a little dirty with ink or pencil.