Hello, I showed a Viscount aircraft on a stamp last night and was asked to write more on the plane. I think the best way I can do that is to introduce you to this excellent site

I do not know the author although am inclined to get in touch. Really nice site and so much  interesting material if you want to read more about the aircraft.

I do not have my aircraft on stamps collection with me, but will get them on my next visit to Sydney and will look to see what I have. In the meantime if you want to read more about this aircraft do enjoy this site