What has attracted many collectors to the Rolex Air-King over the decades is its low price tag. Because of its classic, simple aesthetic and affordable price point, the Air-King was often touted as the "entry-level" Rolex for budding collectors. This is still true today when you look at vintage and pre-owned Air-King models, as these watches are priced low and offer a great selection of styles while still being timeless, and whether new or pre-owned, you can always get a Rolex Air-King at a great price. in the end, it really comes down to what your personal taste and budget are.  
With the exception of a small number of vintage models, the replica Rolex Air-King has always been forged from stainless steel. Today, Rolex uses their proprietary 904L stainless steel, which is not only extremely durable but highly resistant to corrosion. However, with the Ref. 5500, we see solid gold, two-tone, and even gold-topped Rolex Air-King replica watches. Then later, some models of the Air-King ref. 114200 had upgraded versions with fluted bezels in 18k white gold.
Famously, Air-King embraced the simplicity of a smooth bezel. In fact, for decades, that was pretty much all you could get with the exception of a few gold fluted bezels. Eventually, we entered the ref. 14000 era, and in addition to the 18k white gold fluted bezel, we got an engine-turned bezel. On the current 40mm Air-King, you only get a smooth stainless steel bezel.
Over the years, the Rolex Air-King has continued to offer more dial color options. The earliest examples came almost exclusively with black, silver, blue, or gray dials. the Air-King has always come with the classic 3-piece Oyster bracelet; however, certain older examples can also be found in the more elegant Jubilee. the bracelet always matches the Oyster case, forged from the same durable and reliable alloy.
The movement inside the replica Rolex Air-King is only COSC certified with the model 114200. 114200, which contains the 3130 movements. Prior to this, Air-King watches were only allowed to be marked "Super Precision" or "Precision" on the dial because they lacked chronometer certification.
Today, the modern Rolex Air-King measures 40 mm. This is a large size compared to the 34 mm size used for Air-King cases between 1958 and 2014. However, in the past, the 34mm size was considered quite large for a watch. Today, 40mm is actually considered average, and many people now consider Rolex's 36 mm-sized watches to be small. Times are changing, aren't they?