Yes as a matter of fact it is a collectable. We pulled every centenial valve and made a few into special guns. We intended to do a special run with all the centenials but didn't get around to it. Eventually we changed the specs on the valve and they all became obsolete so we had to destroy them.
Hang on to it that one's a keeper!
Pictured is KayleAGD's Centennial Minimag: