Christine, I'm totally new on this game, both on the computer and into your forum. I did sent a previous message which obviously you didn't get so here goes again: both glasses date from the 1920s when they appeared from Leerdam but also ended up in British bulb catalogues so they might have been made elsewhere.both are not so hot with collectors as the green one you sold via Germany to me, that one being older then you suspected. The amber one is not a colour the continent goes for, you'll do better on the blue one.
If this message works and you want to know more I'll be happy to give more information. Patricia