Why are you reporting this puzzle?
Made by Nimrod in 1968 for Sears and sold as a Ted Williams pop-up. 10 x 10 Add-a-room. With the loft it was 15' high. Slept 11, i.e., 6 downstairs and with the ladder pulled up, 5 upstairs. The box was only 6 x 10 but kitchen bumped out in back giving more room inside. Torsion spring lift system so I'm not sure which got weaker with time, me or the springs.