1950 first flight cover for airmail jetliner from Toronto to New York with #C9 stamp. The cover is addressed and sealed and has several wrinkles. The stamp hangs off the edge at the top, so the perforations are worn.

Most items under $20 ship in a first-class envelope with collectible stamps and with card stock and, for stamps, glassine 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.