Flint v21, Warrant Officer Dashiell R. Fairborn, was released as part of the 2014 50th Anniversary Series. He was the driver of the V.A.M.P. Mk II, packaged with an Eel v7 and a Night Raft in the Danger at the Docks set.
Many collectors complained about paint quality issues with the 50th Anniversary line. If you're looking to get one in mint shape, get great shots of the paint from multiple angles, even on figures still sealed in their bubble.