Canada #501, 504 1969 Isaac Brock and Stephen Leacock Issues, a Nice Combination Usage on Double Weight Surface Cover to Denmark, Sent December 2, 1969

A nice combination usage of the 6c Stephen Leacock and 6c Isaac Brock issues on a double weight surface cover to Denmark. Sent December 2, 1969. It should be noted that this rate is highly unusual by this time, as the vast majority of covers were being sent by airmail.

Est $15, as listed in Unitrade.

To gain a better understanding of what I consider in valuing covers, you might find it useful to read the blog post here.