lasting approximately 199 days

According to its documented provenance

hydrogen-filled rigid airship that flew from 1928 to 1937

Originally from the collection of Apollo 15 commander Dave Scott - own a piece of history :

consistent with its aerogramme format and orbital handling

Soyuz TMA-16M flown ISS cover - 1 year in space with Kelly/Kornienko moon lasting approximately 199 daysScott Kelly and Mikhail Kornienko One Year Mission Multi Cancelled ISS Flown Cover Signed by the International Crews An extraordinary artifact of long duration human spaceflight: an original private mail cover carried aboard the International Space Station throughout the historic One Year Mission of Scott Kelly and Mikhail Kornienko. Originating from the collection of renowned astrophilatelist Jacques Bracke, the cover bears four postal cancellations