What kind of info are you after? The FF series was a bog-standard mag from ca. 1927 up to the middle of the 30's, like the BTH MD. Could dig some cataloge pages in German, but that might not be too helpful.
I am missing some parts and I have seen that there are also marelli parts mounted. I have no idea how thess FF1 should look with original parts, so I am after pictures, parts lists, foto's, etc...
Hi, Alex i have a thread in the motoclub.de forum ( in deutscher Sprache) for your mag and mine. (perhaps you can see in: allgemeine Vorkriegsmotorräder, Bosch Zündmagnet FF1........) I hope that anyone can help us. If i know something, i will tell you.