Case XX NASA 25th Anniversary Commemorative Knife.  Exact version of the knife carried on manned space flights and survival training.  11 3/4" sawback stainless blade.  17" overall.  Knife and plaque is brand new.  Found in our back room.   Has been "hidden" from us for 40 years.  Knife and plaque present excellent.  Never used, carried or sharpened - never even hung on a wall.  Handle shows some darkening, as most of this Commerative show.  Certificate of Authenticity affixed to back of plaque.  Each knife individually serial numbered.