Double Bass Questions

[Gordon Gary]

Hello all, new to the forums and have another what about this bass questions.
Posted on another site but did not get much feedback.
What I know.
1. It's a Rubner
2. It's plywood
3. Plays well
4. Looked inside and all I found was a piece of newspaper tack on with a thumbtack written in German

I suspect it's just a student bass and was looking for more info.
Here are the pics.

http://s637.photobucket.com/albums/uu98/rotosound1/


Thanks to all