Books on Reich Era Metal Cap Insignia

[StuG]

I have a majority of the books on Waffen SS insignia, but I‘m interested in knowing which book(s) I should be looking at specifically for metal insignia from the Reich as a whole, military, political, organizational etc. i think the many different variations of the cap eagles is fascinating and would like to learn and see more.

[wilhelm Saris]

Buy an Assmann cataloque and you will find in there many headgear insignia.
A reprint does not cost that much

[StuG]

Thank you so much, where would I be able to find one?

[wilhelm Saris]

Look on the Internet: F.W. Assmann & Söhne Lüdenscheid. There they offer a reprint.

[StuG]

Thank you!