I hope I'm not mixing things up now, because I find it all a bit complicated, and forgive me if I make a mistake because this is just from what I remember, I haven't got any literature here with me ... glassdesigners/manufacterers who got affected by the war, productions interrupted and moved elsewhere later on etc... headspinning stuff ... from what I understood, correct me if I'm wrong, is that Etling's pieces were produced at Sèvres, absorbed by C-l-R, who had the rights to the name and kept using the trademark. Etling never came back from the war and he had no relatives left to claim anything, as they were all deported. All his moulds were kept over there at Sèvres/ C-l-R, and I don't know how the law worked at that time, but if something wasn't claimed after so many years, I guess you could consider it as yours, which legally still applies today. However, brands were perhaps already protected at that time, i'm not sure when copyright was introduced in Europe, but obviously they couldn't carry on the brand name, and i guess that's why you can find signed pieces and unsigned ones, The only way to make sure what it is, is to find a signed piece and that would confirm the whole theory, but I haven't come across one yet...