The Rolex Air-King line had a long and sometimes varied history, but for the last twenty years it has simply been the entry-level model in steel (or steel and white metal). Finally, in 2015 it has been phased out altogether and replaced by less characterful Oyster Perpetual models. To celebrate its passing, here is a picture of an unusual variant which crossed our path : a bicolour version! This is in fact a 5501 model with 9-million case number and 1520 calibre movement. You won’t see many of these, but it is not the only odd Air-King. Have you seen an Air-King-Date, or a Domino’s Pizza Air-King?