Yellow Gold 2016 Rolex Day-Date 40 with diamond and ruby hour markers (photo: Rolex)

The yellow gold 40mm version of the 2016 Day-Date also has 48 brilliant cut diamonds on the bezel as well as hour markers made of baguette diamonds and rubies. Paired with their iconic president bracelet, this Rolex reflects the appetite for diamonds that is often seen in custom Rolexes featured in fashion editorials and red carpets.

This superlative chronometer is equipped with Rolex's 3255 movement. It has a power reserve of 70 hours and is water resistant up to 100 meters. Known as the 'President's Watch,' this Day-Date is one of the most extravagant of the 2016 model configurations.

Click here to check out the yellow gold Rolex Day-Date 40.

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Parts of a Rolex Movement

After I figured out what a movement was, I became curious as to how the inner workings of the movement manage to precisely keep track of time. I poured over diagrams and blog posts, but I was still confused about what each part of the movement does.

Why does Rolex advertise their blue Parachrom hairspring technology? What is an escapement and why do they need to make it better? How do you power a self-winding mechanical movement without a battery?

Though I still consider myself a novice when it comes to horology, I do feel that I now have a basic understanding of how a mechanical watch works. The inner workings of a mechanical wristwatch are quite impressive, even in a time where most technology is based on silicon chips and global positioning systems.

The video below was produced by Hamilton Watch Company in 1949 to explain how a watch works. Much of what the video presents is still a part of how mechanical watches work today. It is the most comprehensive, detailed demonstration that I've found on YouTube to explain the mechanics of a watch movement in layman's terms.

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Rolex Oyster Perpetual Sky-Dweller

This beautiful timepiece is designed to remedy that. With a turn of the bezel, you can set your watch to two different time zones without stopping the watch. This allows you to tell the time in your current time zone while keeping your watch set to the time zone you came from. It also adjusts the date between months with 30 and 31 days, meaning you only have to adjust the date once a year on March 1.

Shown here in 18 karat white gold with a black leather strap and ivory dial, this wristwatch is built to go anywhere and go with anything. Golfer Adam Scott is featured in Rolex's ads for this model.

Golfer Adam Scott wearing Sky-Dweller in Rolex Ad