The Air King is a model derived from the Oyster Perpetual series provided by Rolex.
It is said that the name Air King was given with homage to the aviation industry.
The original Air-King used a movement that did not pass chronometer standards.
Therefore, there is no indication on the 6 o'clock side of the dial.
Instead, the word "PRECISION", which means "accurate", was engraved, indicating high quality.
As the name suggests, it boasts a high degree of accuracy even if it does not pass the chronometer standard.
In addition, the name for each model, called the pet name, was first used by the Air King, and was later adopted by the Submariner and other models.