Titanium cover from the North American Aviation XB-70 Valkyrie, 24.75 x 17.5 with a 27-inch long extension piece and weighing 22.2 pounds. The cover is undamaged except for some minor pitting, the likely reason it was replaced. Weighs 12 pounds. According to the consignor, this object is from the first Valkyrie, a prototype version of the proposed B-70 nuclear-armed deep-penetration bomber for the US Air Force's (USAF) Strategic Air Command. This particular aircraft is on display at the National Museum of the United States Air Force in Ohio. Oversized. RRAuction COA.