VDF Boehringer identification & clutch problem

Hi folks, I've just reposted this thread in this part of the forum. At first I put it in the wrong section.

We have an old VDF gebr. Boehringer lathe, the clutch plates needs to be replaced. The plates are colored blue and bend.

I've dissassembled the clutch and measured the plates in order to get new ones. But the suppliers I've contacted to get replacement parts don't know what article to order as long as I don't have the serialnumber of the lathe. I've inspected the guidings, but haven't been able to find a number anywhere.

I have two questions I hope anyone can help me with;

-Where can I find the location of the serialnumber of this lathe? Any suggestions?

-Can anyone identify this lathe by the pictures, or know where I could purchase replacement clutch discs? The outside diameter of the discs is 92mm.
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