Vintage Russian or Czechoslovakia Iridescent Creamer Sugar Bowl Platter Set

The words on bottom are to as Zeibhart or Zeiphart, on the platter KPH or XPH Siiesir, I just dont know. Its very pretty, from the 1920's, see photo's for measurements, the platter has factory flaw see photo, no chips cracks stains. Can not be bundled due to weight. 3-Bsw/018000/3lbs/98237654788