Hi Bob,

Looks like a "grosser " version of the Imperial Marine dagger.
But, as you probably know, there exist excellent copies of this high end daggers, with this exact Eickhorn maker mark...
Is the blade real damast or artificial damast?
Is the pommel the "open" or the "closed crown" version?
Only very sharp pictures will allow correct authentication.
I must say however, that the grip's ivory does not look like it is +100 years old on the picture you posted...

Best regards,

Herman

You never have enough HJ-knifes!