UN first day covers from 1962 and 1963 for stamps 102-106 and 121-122. The covers are unaddressed and have tucked-in flaps. They show some yellowing.

Most items under $20 ship in a first-class envelope with collectible stamps and with glassine and card stock for protection; more expensive or heavier items may go Ground Advantage or Priority Mail. 

Check out my store for stamps, postal stationery, and covers (first day, space, flight, and more) from the US and worldwide. Most items come from my historian dad’s collection amassed over the course of more than 65 years. He specialized in the US, Nepal, and mountain climbing but collected from all continents.