What is a “first day cover” and what is specific about it?
When a new stamp is issued, the stamp collectors buy that stamp and use them to the envelops on the very first day of the sale. The
new stamp gets the post mark and the date. This is called the “first day cover”. The receiver never opens it because he knows that he has himself just put a blank paper in it. Charley found this type of cover in his stamp-collection.



