An open, but complete, set of six unused cards produced by the Science Museum in conjunction with the long-gone Urban Council.  The scan shows the paper sleeve (upper left) and three of the six cards.  The other three cards include a relief model of Hong Kong’s land area, a security robot on patrol in the museum, and “images made from the synchronization of a series of time-lapsed images taken by camera”.  The aircraft, not incidentally, is “Betsy,” a DC-3 built in 1942 and the first plane of Cathay Pacific Airways.  Grade: 1