I was reading this thread only last night thinking that there's about as much chance of me ever finding a piece of Daum as someone inventing a chocolate teapot that holds boiling liquid. Imagine my surprise at finding a 5" Verre de Jade blue vase at a local boot sale this afternoon. Luckily the dealer failed to notice (or couldn't read) the clear signature around the side so it cost next to nothing.
I probably wouldn't have looked at it but for the pic of the bowl above, so thank you, thank you to everyone who's contributed to this thread.