From the notes in yours, I would think that this one is probably from the 1930's or 1940's, and certainly before the end of WWII. It looks like it's design was copied for the Jablonex version that Thomas and I have. The Riedels were then no longer in Jablonec, as they were expelled and some even imprisoned. But the factory was still there, with the molds and the techniques.....

BTW: I do not have the large book that I have shown here. Unfortunately, it was not for sale. I probably would not have been able to afford it anyway.