design with Dart 541s, not built. Type 841 Production variant for British European Airways with Dart 541s, not built. Type 842 Production variant for Iraqi Airways with Dart 541s, not built. Type 843 Production variant for CAAC with Dart 525 engines and 52 seats, six built, first delivered in October 1963. The last delivery and the last Viscount to be delivered in April 1964. Type 845 Production variant for Pakistan International with Dart 525s, not built. Proposals Type 850 Viscount Major project, not built. Type 870 Improved second-generation variant, developed as the Vickers Vanguard. References Notes Bibliography Andrews, C.F. and E.B. Morgan. Vickers Aircraft since 1908. London: Putnam, Second Edition, 1988. Eastwood, Tony. and Roach, John Turbo Prop Airliner Production List. West Drayton, UK: Aviation Hobby Shop, 1990. Jackson, A.J. British Civil Aircraft 1919-1972, Volume III. London: Putnam, Third Edition, 1974. Turner, P. St.John. Handbook of the Vickers Viscount. London: Ian Allan, 1968. Lists of aircraft variants Vickers aircraft