The Rolex Air-King is a line of wristwatches produced by Rolex, a Swiss luxury watch manufacturer. The Air-King was introduced in 1945 and was initially designed as a tribute to the British Royal Air Force pilots who fought in World War II. The Air-King has a simple and classic design, with a clean dial and large Arabic numerals for easy legibility. It is a popular choice among replica watch enthusiasts and collectors due to its timeless design, reliability, and association with aviation history.