North American XB-70A-1 VALKYRIE USAF High Altitude Strategic Jet Bomber 
The Forerunner of Super Sonic Transportation
Prototype of aircraft that never actually went into production. One design was proposed to have nuclear-powered jet engines, which proved to be technically insurmountable and dangerous. Some aspects of this design, especially the streamlined fuselage and delta wing, were later incorporated in the US design version of the SST, which also never reached production and operational status.
Plastic Model Kit by  AMT/ERTL Kit # 8907
Scale 1:72    Skill level 2
Assembled Model measures over 31" in length with wing span over 17 1/2".
Detailed cockpit, engines, bomb bay, and landing gear.  Over 75 detailed parts.
New, never opened. Box slightly indented on one side, but plastic wrapping is still intact.