These are four Rosenthal Germany Crystal glasses designed by Bjorn Wiinblad. It's a great mid-century Scandinavian design. This delightful pattern is called Romance. The glasses are signed on the base with a letter R, Rosenthal Studio line or Rosenthal. They're all used, but there are no chips, nicks or cracks, nor cloudiness.
There are minimal signs of use. Since these glasses are handmade, they'll vary a little in size and weight.