Derek Meddings may not have designed the SWORD Moon Bus but he did create the brilliant Thunderbirds Hover Bus. The wooden model can be seen top left on the shelf behind Derek in this old print below. Amazingly the wooden model still exists and prior owner Graham F kindly supplied the picture below. You can see the black and white photo in far more detail, together with a fascinating discussion and the Hover Bus over on the superb Eagle Transporter Forum, which includes the origin of the 'PURE' sticker below the driver window.
You can also find out more about this and other surviving Century 21 models at the excellent Gerry Anderson Props, which even includes a vehicle, which appeared as a small sketch of a truck in the SWORD annual - the Superon/ Yellow Fox.
Picture courtesy of Graham F