Two single weight airmail covers to Europe (one to Germany and one to the Netherlands), franked with singles of the 15c United Nations Issue on fluorescent paper. Both were sent in 1971, so they are used just a little late to be strictly in period. Still, these are not easy to find and are quite nice.
Est $25.
To gain a better understanding of what I consider in valuing covers, you might find it useful to read the blog post here.
