Larry,
Thank you very very much for your comment, I will be keeping this one that is a promise :-)

E Rader: you are absolutely right, It screams history, Dont worry i will not clean the patina of the dagger,neither will i open it to check the markings on the crossguards,it stays as found:-)
There is one thing that bothers me ,,the scabbard,,
it screams to take of that rust, so i found my self in a situation where i dont know what to do??? to clean of that surface rust or leave it as it is...
any ideas?

cheers