I just bought a WKC NSKK dagger with the cross guard marked Nm. It is not unit marked and one can see that below the black is the original anodising (it shows through as slightly brown)

Each item that can be researched will throw up a lot of information. Books being books and editors being what they are, there will only be so much you can cram into a publication so it needs to be selective. I have some nice books on head gear that are nothing more than a gallery as Mark Yerger points out. But I can understand why as the authors are covering all areas and they are intended as generalised reference.

I am looking forward to TW's book because SA/NSKK daggers make up a large chunk of my collection. Along with the updated MCSARR list it will be an exciting bonus.

Regards

Frank