Vladimir, the mark is there (reflex), I took another pic where you can see it but it is a little blurry. So I add a clear photograph of the mm here.
The fittings are EARLY period pure nickle but as the dagger is in extraordinary condition they are shiny like later plated fittings. If you hold the dagger in hands it is clear to see.
Concerning the grip, I don�t think it is a special late period form and it fits the guards perfectly.
Regards,

Unbenannt2a.JPG (13.01 KB, 184 downloads)

wotan, gd.c-b#105

"Never look for sqare eggs" as a late owner of an original FHH-dagger used to say.