Mike, This is not Concorde but the Boeing 2707 ! Or at least probably the US SST as it was then known. Check the vertical fin at the rear bottom, possibly the Lockheed design. However I am not aware that AC ever committed to the 2707. AC did optioned 4 Concorde's in 1965. Robin, I am not quite sure that I understand what is the #23 you mention and the distinction between production and USSST lines. Is this the US SST planned production sequence ? If so, can you post it ? I know only a few numbers and have been looking for this sequence for years. Cordialement, Alexandre. AeroTransport Data Bank http://www.aerotransport.org > TWA had 9 on order (I have a twofoot model in TWA colors) and was due to get #23 off the > production line (#1 off the USSST line) and had plans for round the world service with both > aircraft. > > Robin H.H. Wilson > Mike Gammon wrote: > > Once upon a time, Air Canada had these on order. Here's an artists rendering: > > http://www.achorizons.ca/en/issues/2003/october/concorde.htm > > Mike Gammon --