It seems to always be at Tsukuba whenever auto-otaku takes pics. The RWB shop is very small and cluttered...putting out some of the most amazing artwork. So I wouldn't doubt it took that long. I ran their blog through Google Translate so you can actually read it lol.
http://translate.google.com/translat...blog8.fc2.com/
*edit*
Looks like you have translate each page separately if you want to view the pics though.
Website:
http://www.rauh-welt.com/OpenTop.html
Blog:
http://rauhwelt.blog8.fc2.com/
I don't know why all the pics on their blog are sideways but it's really annoying lol!