Classic retro-future. A spacecraft concept inspired by the 'Round The Moon' design of Wernher von Braun and the Collier's illustrations by Chesley Bonestell. First released as a plastic model kit by Lindberg in 1958 as the 'U.S. Moon Ship.' Re-issued (with new box art) in the 1960s as the 'Mars Probe Landing Module' - then again in the 1970s as the 'Star Probe Space Shuttle.' Finally, in the 1990s, Glencoe re-issued the model (new box art again and different decals) and called it the 'Lunar Lander'. I have the Lindberg 'Star Probe' version, which I built years ago, sitting on a shelf.
My (Blender/Multistage2015) model for Orbiter borrows from all of the above (and is scaled appropriately), but fidelity is less than 100% - I made some changes in the vertical supports and landing legs, and eliminated the bottom tier of horizontal struts that are included in the plastic models (The von Braun/Bonestell designs did not include either set of horizontal struts, and lacked landing legs altogether - as the ship was intended strictly for travel in space, among orbiting or otherwise off-planet stations.).