V1 Punks are the original NFT set of the well known CryptoPunks NFT set released by LarvaLabs in 2017. However, due to a bug in the smart contract, the V1 Punks were deemed inauthentic by Larva Labs after it was discovered that when someone bought these Punks, they could withdraw their own funds, effectively acquiring the NFT at no cost!

V1 Punk owners are now able to wrap their Punks into an ERC-721 contract and patch over the bug of the original smart contract. This recovery of the original Punks smart contract is a community led and rapidly growing phenomenon consisting of original Punk claimants, NFT historians, digital archeologists and extremely talented developers. There is no clear leader and all important decisions are voted on by community members.

V1 Punks are not a derivative, but are in fact the original set of Punks released by LarvaLabs in 2017 (and actually predate the release of LarvaLabs CryptoPunks NFT) 
This is verified on the Ethereum blockchain and is immutable.

V1 Cryptopunks (Wrapped)

CryptoPunks were released & free to claim in 2017, but were not safely tradable. This modern wrapper allows Punks to be traded on current NFT marketplaces.

CryptoPunks have a transparent background for visualization of their current status, the lavender background designates the Punk has been safely wrapped.

The recovery of the original Punks smart contract is a community driven project.

V1 PUNK #1044

A wrapped Cryptopunk from the original exploited V1 contract. Buyer beware - if you don't understand the preceding sentence, this is not the Cryptopunk you're looking for.