Here is one of the most uncommon and desirable of all the Air-Kings – a 1959 Rolex Air-King ref. 5504 oversized Super Precision. The 5504 seems to have been only produced in 1958-1959 from our experience finding them over the years. This is the largest and one of the rarest of all the Air-King series of watches. The case is the same measurement as the early Explorer watches from the same era and measures 36mm across not including the crown.