This lot of 15 NASA astronaut signed autograph envelopes is a must-have for any space enthusiast. These vintage auto-pen examples are an original and authentic piece of collectible history. The envelopes were signed by the astronauts themselves and come with a certification of authenticity.

The autograph authentication is a key aspect of this item's value. The envelopes were signed in the United States and are a great addition to any collection. The modified item has not changed the envelopes in any way. This lot is perfect for collectors who want to add an authentic piece of space history to their collection.