Slightly off topic but related to the original thread as to why this cover had a postage due: here is the page from NSSC which indicates that the local rate increased from 2 cents to 3 cents in July of 1940--thus requiring an additional 1cent and 1 cent for penalty.
I just discovered this based on some of the other posts above--that the NSSC has all information on rates from 1846 to 1949.
Not sure why this appears to be different than the source that Gportch cites which apparently indicates a different date for the increase in Newfoundland(all due respect--just don't have that source...)
I will probably join the organizations mentioned above, thanks to all
