This is the small coupling to go onto the magneto where a two prong drive is used, like early Delage. It fits any standard magneto shaft and the nut is concealed in the main part. There also the special part used to tighten up the special nut.It's been on my shelf for years and I'm having a clear out!
Original Betriebsanleitung Mercedes 10/40 PS von 1923.(1.Mercedes mit Kompressor !) 20 Seiten , nur Text , keine Bilder !Guter Zustand.Preis mit Versand, in der EU ,190,-Euro.Außerhalb der EU plus Porto.