You acquire a fine 1st Edition Gunslinger that comes with a mylar-covered dust jacket that is unotorn but the lettering is faded to white on the spine. Some time later, you acquire a brand new, unrolled dust jacket.

Do you:

1) put it on.
2) keep the original on and the other in safe keeping, just in case.
3) lie awake at night because you can't make up your mind...