I received the above envelope from a Boston area eBay seller containing stamps I purchased for my collection.
At first blush, the envelope looked innocuous: three commemorative stamps, 4¢, 20¢ and 25¢ denominations adding up to 49¢, the current rate for First Class Mail for 1-ounce letters.
I did not notice anything unusual until I took scissors to the envelope to clip off the stamps. Only then did I notice that the 25¢ denomination stamp was not a U.S. stamp; rather it was a United Nations stamp (Scott #284 from 1977)!
Believe it or not!