help with a nsdap wool armband

[warcollectorantwerp]

i need some help with the rzm tag.
can anyone give me some info about how to read it and search wich maker who made it ?

[Finngaill]

The big D is for a tax, depending on the complexity of the work. A4/343 corresponding to the licence holder (A - Ausrustung / Outfitting), in this case Cramer von Clausbruch. The letter E is for 5M (E is fifth letter in alphabet), it is serie code for manufactured item. It start from A 000001 to A 999999 etc... until it reach E 383513.

To find out maker you can just use google. Or you can buy Handbuch der RZM 1935 on PDF, it is handy.