Hi Steve,
The book "Ilyushin IL-12 and IL-14 - Successors to the Li-2" by Y. Gordon and D. Komissarov (Red Star Vol. 22, Midland/Ian Allan, ISBN 1-85780-223-3, 2005) features on page 73 a b/w photo of a Polar Il-14P. The captian says: "pictured here in pre-1973 silver/red Polar colours". The livery is basically the same as featured on your first two screenies. There is no mention of a combination of this livery with a white top, so I would say that your silver/red liveries are the correct ones for that period.
From 1973 on the Polar livery was based on the early 70's Aeroflot livery, similar to the Polar An-12 livery.
Cheers,
Maarten