A prop envelope used in the first instalment of the Harry Potter franchise. Unlike the flying envelopes that have a printed seal on the back this envelope features a real wax seal and a more elaborate envelope design. Sealed within the envelope is a piece of paper with a metal corner, presumably the Hogwarts invitation letter, not that I'm going to open it to find out!
This piece is accompanied by a letter from Warner Brothers.
More from Harry Potter and the Sorcerer's Stone (2001)