A friend of mine asked me to take a photo series of his father's glass collection. His father lives in an old people's home and can't take everything with him, so my friend tries to find out which are the most valuable things. So yesterday and today I took hundreds of pictures. The family worked for the glass factory Loetz in Bohemia before the war and kept a number of experimental samples. I think they are rare; I promised to find out.
P.S. In E-bay, there are some similar things, and they reach good prices. But I haven't seen anything exactly like this. Maybe they decided not to produce larger series, or history prevented that.
P.P.S. Most Loetz is in America. Possibly more than they produced.