Troy, your dagger is simply beautiful and a perfect example and reason for why these artifacts should be cleaned and preserved. The supposed interest in TR artifacts is their existence in that period prior to to May 1945, whatever any collector sees in 70 years of post accumulated muck is beyond me.
and please don't mention 'Patina' it's no such thing, true patina is years and years of gentle caring not the gunge we see on some examples.