I am looking at the following Ekm wich is for sale and I am thinking of bidding on it. In my opinion it is a good one, but I’m trying to find out wich unit this might be and I’m having some trouble.
I know it’s an Ersatz Batterie, but that’s about it. I’m having a hard time trying to find what the F.W.P.Z abbreviation stands for.

Your help is very much appreciated.

Regards, Rik