Thread: vintage f.herder and j.a.henckels

i've got these vintage pocket knife from my grandfather. i need an advice on how keep the blade clean (away from rust)
is this it complete set? the set composed of 1 mother of pearl spoon and 2 pocket knife.
the mother of pearl got "f.herder a s german" mark, and the copper one got "j.a.henckels" marks on it
in which year does these actually made in, cause on the cover of the box indicate 1848 , 1867, and 1771
thank you!