It's not even fake, but a complete fantasy piece, and a fairly common one at that.*
Warrant disks were carried by plain clothes policemen, whereas the SS-Heimwehr Danzig was a military formation and would have had no use for such an item.
That alone would be enough.
However, beyond that, the "AMT FÜR SICHERUNGS AUFGABEN" text makes no sense, either; the HWD had no connection to any agency of this name.
Also, Sicherungsaufgaben would be spelled as a single word in German.
Furthermore, the HWD had no Kradschützen unit.
*) For other examples, see:
SS Auschwitz disc. Is it real? Heimwher Danzig Kradshtz Nr 24313 ausweis (same number)
AMT Fur Sicherungs Aufgaben
Heimwehr Danzig ID disc (ausweis ?)
Well, its no loss to me and I always love an education. So off it goes to the $5 bin.
you're over charging 50cents including post.--lol.