I have A6-435 as VM-NSL but I don't have A6-436.
Sorry, Greg. Although I flew both Viscounts I haven't a clue about their call-signs. Too long ago. I do remember A6-435 had a weather radar set that could be slid up and down at the rear of the radio consol and was for a flight engineer to use. The cockpit was set up to carry an FE in USA. A second screen was for pilot use.