Type 779 Production variant for Fred Olsen with Dart 510 engines and 48-seats, four built, first delivered in April 1957. Type 780 Basic design standard for with Dart 510s and VIP interior, not built. Type 781 Production variant for South African Air Force with Dart 510 engines, a VIP interior and slipper tanks, one built, delivered in June 1958. Type 782 Production variant for Iranian Airways with Dart 510s and 48 seats, three built with the first delivery in March 1958. Were convertible to VIP interior for the Shah of Persia. Type 783 Production variant for LAC with Dart 510s, not built. Type 784 Production variant for Philippine Air Lines with Dart 510s, 48 seats and slipper tanks, three built, first delivered in May 1957. Type 785 Production variant for LAI-Alitalia with Dart 510s and 48 seats, three built, first delivered in March 1957. Type 786 Production variant for Lloyd Aereo Colombiano with Dart 510 engines, 48 seats and both slipper and belly tanks, three built, first delivered in August 1957. Type 787 Production variant for Iraqi Airways with Dart 510 engines, not built. Type 788 Production variant for Syrian Airways with Dart 510 engines, not built. Type 789 Production variant for the Brazilian Air Force with Dart 510 engines, slipper and belly tanks, and VIP interior. One was built; delivered in December 1957. Type 790 Basic design for local service variant with Dart 506 engines, not built. Type 791 Production variant for AVIANCA with Dart 506 engines, not built. Type 792 Production variant for Pakistan with Dart 506 engines and VIP interior, not built. Type 793 Production variant for the Royal Bank of Canada with Dart 510 engines and a VIP interior, one built. Type 794 Production variant for THY (Turkish Airlines) with Dart 510s and 48 seats, four built, first delivered in January 1958. Type 795 Production variant for Trans World Airlines (TWA) with Dart 510 engines, not built. Type 796 Production variant for Turkish Air Force with Dart 510 engines and VIP interior, not built. Type 797 Production variant for Canadian Department of Transportation with Dart 510 engines, one built, delivered in March 1958. Type 798 Production variant for Northeast Airlines with Dart 510s, eight built. Viscount 800 Improved variant with the fuselage extended by 3 ft 10 in (1.2 m), 67 built Type 800 Basic design, not built. Type 801 Production variant for British European Airways