I cannot think of a designer for certain, the label is pretty unusual and my best educated guess suggests it is not directly Skrdlovice. This is not disappointing, because UR, although on the Skrdlovice labels, does not mean Skrdlovice, UR is "Ustředí uměleckých řemesel Praha," the "Centre for Fol Art Production (Prague)" which had several, the main ones being Skrdlovice glassworks and the cutting centre in Prague. This piece seems to be from the cutting centre, like Michael's Stahlikova cut bowl, blown at Skrdlovice, cut at the UR cutting centre, but not a pattern book item. I would estimate a date of circa 1955 for your piece, and Smrckova, Kotik or Stahlikova as possible artists, although I am speculating really at the moment and I will try to find out more exact information. Jindrich may know a little more.... a lovely item though! (I agree with Ross about the Scandinavian influence but at the same time, the execution style makes the piece pure Czech).