If I beat Halo 3 Campaign on Legendary, then on easy, which show up as my stamp?

[Lee]

I beat campaign on co-op on legendary and now I want to go on an easier difficulty to get some achievments. If I beat it on easy, would it show that I beat it on easy or legendary in my service record?
I am going to do co-op again on easy, just like I did on legendary.

 

[seth the roth]

it will show up as legendary, what i did was beat it on normal first, then legendary via co-op, now, because i want to say that i did it, im gonna do it all again on legendary by myself, which is takeing ages lol

 

[Minnow]

it shows your highest rank - so it will keep legendary

 

[desertshark666]

No it won't replace it, it will stay the same to show that you have beaten the game on this difficulty as your highest.