Thanks again Gareth!
After I read your post this morning, I did some searching and came across that website, but I didn't have time to really go through it thoroughly, so I didn't find the article you did. It is nice to actually find and see the mark somewhere! It does refer to it as being Czech, so I have a lot more to go on now. My German is not so good (basically, nil!), but I think I can interpret enough to get some information.
It is an excellent site, and I now have the time to really go through it.
As soon as I find anything out, I will post here asap.
Thank you again, you have been a huge help!