The April 20th, 2021 "Stoney Seinfeld" postcard.
Every year, a new one is released. If you are holding this NFT in your wallet and visit the site listed in the unlockable content on April 20th of every year, you will automatically receive next year's NFT for free.
The postcards are pyramidally released. This is the first in the series, so only one will be minted. In 2022, 2 copies of the postcard will be released, in 2023, 3 copies, etc.
Each year's postcard is unique, and the pyramidal release means next year you can have one to sell and one to keep. Spread the 420 joy, but always keep a head stash.