The RAF pilots were honoured for their duty in 1945, when Rolex founder Hans Wilsdorf named a series of Oyster watches after them. The Air-Lion, Air-Giant and Air-Tiger might not sound familiar as they were discontinued shortly after production. However there is one model still being produced, even after 70 years, which is the Air-King. Over the years, Rolex kept refining the Air-King and they continued to issue new reference numbers. All different reference numbers have a few things in common. They all have simple designs, are executed in steel, and house a no-nonsense, reliable movement. Although it has always been among the least-costly models of Rolex, it is loved by many watch enthusiasts.