The Rolex 68279 crown, while not a model designation in itself but rather a component within several Rolex models, represents a crucial element in the brand's legendary reputation for precision and water resistance. This article delves into the significance of the screw-down crown, particularly as it relates to models frequently searched for, such as the Rolex Datejust 68278 and related references. We will explore its function, its importance in maintaining the chronometer certification, and its place within the context of the broader Rolex market, touching upon the pricing and availability of related models.
Understanding the Rolex 68279 Crown's Functionality:
The Rolex 68279 crown, like other screw-down crowns used across various Rolex models, is not just a simple winding mechanism. It's a meticulously engineered component designed to secure the watch case against water ingress and dust. Unlike push-pull crowns found in some less expensive watches, the screw-down crown requires a deliberate twisting action to secure it tightly against the case tube. This creates a hermetic seal, protecting the delicate internal movement from the elements. This critical feature is essential for maintaining the watch's water resistance rating, often reaching significant depths, depending on the specific model. For example, a diver's watch with a screw-down crown like the 68279-type will be far more resilient to underwater pressure than a watch with a push-pull crown.
The crown itself is typically made from high-quality materials, often stainless steel or precious metals like gold, depending on the watch model. Its design often incorporates knurling – the textured grooves – to provide a secure and comfortable grip, even when wet or gloved. The precise machining and tolerances involved in its creation are a testament to Rolex's commitment to quality and precision.
The Rolex 68279 Crown and Chronometer Certification:
The Rolex 68279 crown plays a direct role in maintaining the chronometer certification of the watches it equips. A chronometer is a timepiece that has undergone rigorous testing and certification by an independent body, such as COSC (Contrôle Officiel Suisse des Chronomètres). This testing ensures the watch meets extremely high standards of accuracy and precision.
The screw-down crown's hermetic seal is vital in protecting the movement from external factors that could affect its accuracy. Changes in temperature, humidity, and pressure can all impact the performance of a mechanical movement. By effectively sealing the watch case, the screw-down crown helps to create a stable environment for the movement, allowing it to operate within the stringent tolerances demanded by chronometer certification. A compromised seal, whether due to a damaged crown or improper sealing, could lead to a failure to meet chronometer standards.
Rolex Models Featuring Similar Screw-Down Crowns:
While the "68279" isn't a specific crown designation universally applied by Rolex, it's often used in online listings and discussions to refer to screw-down crowns found in specific Rolex models, particularly those within the Datejust line. It's important to note that Rolex doesn't publicly release detailed part numbers for individual components like crowns. The number might be an internal reference or a common designation used by sellers.
The most frequently associated models are the Rolex Datejust 68278 and its variations. This leads us to explore the market value and availability of these watches.
Rolex Datejust 68278 Price and Market Analysis:
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