The Moon Base Exploration Center (Moon Base H.Q.) with most of its furniture and components, as well as the shuttle capsule (and part of the railing) from the MLP, a loose rotor blade and a number of astronaut figures. There are also two grey figures (with LP markings visible), which would surprise me as having been part of this set.
Box size
Length
Width
Height
26.3 cm
16 cm
19 cm
10 3/4 in
6.5 in
7 7/8 in