In the AskReddit community, MellowArtichoke wanted to know: What’s the rarest thing you own?

Redditors shared their most unique possessions. Some were pieces of a historic moment. Others were special-edition, never-to-be-made-again collectors’ items. Many were scored by strange happenstance.

Here are the things they showcased, and the stories behind them.

Original Mercury launch control diagrams

Devouredbylog: “My grandfather worked for NASA and passed down to me the original Mercury launch control diagrams. … I am in the process of getting them preserved now and should hopefully have some high quality scans soon. I cherish these items and hope to pass them down to my kids one day.”

1996 Volkswagen Golf Harlequin

Travis_Stewart: “So I own one of only 264-ever-produced 1996 Volkswagen Golf Harlequins. This one happens to be number 83. It came as it looks from the factory this way, and my car on paper is ‘blue.’ The pattern isn’t random—this is specific to which base color your received. It was just about 10 years of searching to find this specific car in this condition and color, and the icing on the cake was it was a factory 5 speed manual (only 30-40% came this way). As of right now, there are just over 100 still accounted for. So yeah, I own this little oddity, and love the heck out of it.”

An 1889 Rand McNally World Atlas

TudorGothicSerpent: “I bought it on an auction website called Listia for the equivalent of $20. It has advertisements for horsedrawn carriages, a map of the Russian Empire and prints depicting Los Angeles as a smallish city with a store-lined main street. It’s one of my most cherished possessions, because it’s fascinating and incredibly beautiful.”

A North Korean propaganda poster, hand-painted in North Korea

kjerstih: “I bought it at a bookstore in Pyongyang, when I was visiting North Korea for 8 days with Koryo Tours in March 2014.” Hogwarts acceptance letter Teaisjollygood: “I own one of the 6 copies of Harry’s Hogwarts acceptance letter they made for the first film. My dad’s ex-girlfriend was the head of publicity for Harry Potter, she was able to get hold of it for my 10th birthday, or that Christmas. I forget.” Beta Black Lotus in mint condition (Magic the Gathering) Grasswalker: “I traded it for a full Jund deck back when Jund was the best deck. An old returning player wanted to get back into MTG so I asked to see what he had with him. I literally gave him the Jund deck I was playing at that FNM as well as a few things from the binder. He had no idea of its value, or any of the values he had with him but I wouldn’t live with myself to scam the guy. Jund got banned and reprinted loads anyway, so joke’s on him.” A Gameboy Color signed by Jackie Chan

2beastings: “I was walking into the hospital to visit my cousin who was sick and [Jackie] was walking out with his people. I had my face buried in Pokemon (Blue, obviously) when my parents tapped me on the shoulder and told me to look up. I grumpily did, looked at him and said, ‘What?’ to my parents. I was really young at the time and it didn’t hit me who it was. The woman he was with asked if I had anything he could sign and I wad still confused. The only thing I had was my Gameboy so she suggested that. He signed the battery cover. I was still sort of in shock so it never really hit me how cool this was. Afterwards I was an idiot and kept playing with the cover on so the signature faded a bit. I played with the cover off from then on but you can still see it.”

A flag that was flown in space on the Space Shuttle Endeavor in 2007.

KillerAceUSAF: “When we where stationed in DC with my dad at that time, he got invited to a special event by NASA. So we went to the event for wounded service members, service members, and their family. The whole event was done by two astronauts that were at the time also service members, and they gave a talk about what it is like to be an astronaut. At the end, they did a Q&A, and gave everyone a folder that had the letter and flag. Thankfully they had enough for the family members so that I could get one! It has been my most prized possession.”

Original 1977 mold for Ernie’s rubber duck

fuckswithducks: “I’m a rubber duck collector. After years of searching, I finally found an original mold of my favorite rubber duck! This vintage toy mold is made out of solid copper and weighs around 3 pounds.”

See the full discussion with many more rare items in the original Reddit thread.