Yes John I was...... very excited.... and yes.... it would appear that "Franz" may have had s little help.....
Kevin actually found the first in a facebook post of about 200 old cards by the gentleman. They were all of Hrob / Klostergrab. I contacted him and started a conversation and he provided some known history and more images. He lived in Hrob / Klostergrab for about 35 years and then moved to Most, which is nearby.
I now know the history behind the area names and their derivations. I have an image of a grave marker on a wall of 4 family members who died in 1945 and are buried there. Both recent and old images of the family house of the wife of Josef Welz, the eldest son who ran the company with his brother Franz Alois Welz until the end in the mid to late 1930's.
I also inadvertently ran across an envelope on ebay I purchased, while doing a Klostergrab search after seeing the cards from the collector, which it turned out had a Franz Welz seal on the back flap which was intact. The letter was opened across the top. There was no mention of Welz, only the age of the stamp, the original value, and the fact that it had a Klostergrab cancellation on it. The letter it seems was sent by Franz Welz in 1867 to Josef Wendler in Haida, who was also a manufacturer of "Fancy Glass Goods" according to a later ad in a London paper. That ad was provided by Anne. Apparently Wendler also made trinket sets.
The letter is gone, but I am sure the envelope was written by Franz Welz and the seal placed on the flap by him.
I am incredibly excited to get it. It is coming from Austria. I will frame it in a double sided frame so that I can see both sides of it.....
So it has been kind of exciting here for a few days... in a geeky kind of glass way....

Maybe at some point some brochures of some kind will eventually show up....... One can only keep their fingers crossed.
Craig
Pics of the envelope used with permission.