In this week’s episode of RANT&H, Christian dives into the more technical side of one of Rolex’s most FASCINATING modern releases: the Sky-Dweller.

While it may not seem the bit on the surface, the Sky-Dweller is actually Rolex’s most complicated production model at present. The Sky-Dweller combines both the Annual Calendar and the Dual Time Zone complications to create a piece that, if we’re being honest, looks far simpler than that. While Rolex certainly has a history of producing more complicated pieces, this is the most complicated modern production model by far.

So what’s an annual calendar do, exactly? Well, in short, it’s a date complication that is inherently aware of which months have 30 and which ones have 31 days. Unlike a perpetual calendar, though, it has NO clue what to do about the jump from February to March. Unlike how the month is traditionally displayed (via a subdial), Rolex uses a red indicator behind each of the hour markers, corresponding with the number of each month. It’s a really interesting, unique way to reimagine the traditional date display, and I really dig it.

As for the Dual-Time indicator, that one’s a bit more obvious. There’s a disc in the center of the dial that is marked with numbers from 1-24, and the triangle on that subdial indicates which hour it is in the second time zone. What gets insane, though, is the ability to control all of this through one crown, without any extra pushers or crowns for the complications. This is accomplished thanks to the so-called “Command Bezel” which, depending on how it’s set, indicates to the crown which feature of the watch it’s controlling. It’s incredibly fascinating, complicated, and looks pretty badass in the process.

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