What are the practical advantages of the Omega Seamaster?

Born in 1948, the Seamaster is now one of Omega's most popular collections. While a wide variety of models are available, including the Seamaster Aqua Terra and Seamaster Diver 300M, all models boast exceptional practicality. This article will explain the Seamaster's capabilities from a practical standpoint, including features such as the Master Chronometer and the Co-Axial escapement.

Practicality as seen in the movement

Let's take a look at the practicality of the "Seamaster" mechanical movement.

The "Master Chronometer" is attracting attention.

　In modern living environments, magnetism is one of the factors that can affect the accuracy of mechanical watches. There are many sources of magnetism around us, such as speakers in smartphones and laptops, magnets used in bag clasps, and magnetic necklaces. When mechanical watches are exposed to magnetism, internal parts such as the balance spring can become magnetized, which can lead to a decrease in accuracy or even cause the watch to stop.

　Omega's Master Chronometer certified models are watches that solve this problem. The Master Chronometer certification is a watch certification standard set by the Swiss Federal Institute of Metrology (METAS), and obtaining it requires passing two stages of testing.

　First, the movement itself must be tested and certified by the Swiss Official Chronometer Testing Institute (COSC). Then, METAS conducts eight different tests on the finished product, which includes the COSC-certified movement housed in a case. In other words, the Master Chronometer certification system is a double certification system, meaning that the movement must meet the COSC accuracy standards and then undergo even more rigorous testing.

　Its most distinctive feature is the requirement to maintain an accuracy of 0 to +5 seconds or 0 to +7 seconds per day, even after exposure to magnetic fields of 15,000 gauss or more. 15,000 gauss is equivalent to the magnetic field strength emitted by typical MRI machines used in medical settings. While you wouldn't undergo an MRI scan without removing your watch, this demonstrates its sufficient resistance to all kinds of everyday magnetic sources.

　Omega has adopted non-magnetic silicon for the balance spring of the escapement, the heart of the movement. Similarly, non-magnetic alloys such as Nivagauss™ are used for the escapement's key components, such as the lever and escape wheel. It's noteworthy that instead of relying on a soft iron inner case to protect against magnetism, the movement's components themselves are designed to be unaffected by magnetism, ensuring practicality in strong magnetic environments while maintaining a slim case thickness.

　The Master Chronometer standard not only ensures superior magnetic resistance, but also rigorously verifies high accuracy and stable operation. The METAS certification test takes place over 10 days, and in addition to accuracy under strong magnetic fields as mentioned above, the watch's performance is tested under a variety of conditions, including water resistance and power reserve.

　Equally important is accuracy testing that simulates actual wearing conditions. Mechanical watches have characteristics that make their accuracy prone to instability due to positional differences and as the mainspring, which provides the power, unwinds and decreases. Therefore, in the test, the accuracy is measured by rotating the watch in six different orientations. Furthermore, it is verified whether the watch meets the organization's accuracy standards not only when the mainspring is fully wound, but also when the power is reduced.

　Passing these multifaceted tests proves that the Seamaster keeps accurate time reliably under all everyday conditions, including when worn on the wrist and when the mainspring is low.

Coaxial escapement for long-term use

　To maintain accuracy and stability over the long term, it is crucial to minimize wear and tear inside the movement. The escapement, in particular, plays a significant role in accuracy and is one of the central mechanisms in a mechanical watch that is prone to friction.

　Omega's technical solution to this challenge is the "Co-Axial escapement," conceived by George Daniels and successfully mass-produced by Omega. In a typical Swiss lever escapement, the teeth of the escape wheel and the pallet jewels of the anchor move in contact, so the condition of the lubricant greatly affects the maintenance of performance. On the other hand, the Co-Axial escapement uses two escape wheels stacked on top of each other to create a three-layer structure of teeth, and an anchor with three pallet jewels. This mechanism distributes the energy applied to each part and reduces friction between the parts.

　Currently, most of the mechanical movements Omega produces are equipped with this Co-Axial escapement. The aforementioned Master Chronometer certification and the Co-Axial escapement—these two elements play a significant role in the long-term reliability that underpins the practicality of the Seamaster.

Practicality as seen in exterior materials

　The Seamaster not only excels in its movement, but also in the materials used for its exterior, offering practical benefits, particularly in resisting deterioration over time. The use of these materials not only enhances the watch's aesthetic appeal and luxurious feel, but also provides practical advantages in terms of protection against scratches and discoloration that occur during everyday wear.

　One example is the use of ceramics. Many current Seamaster models utilize ceramics for their bezel inserts and dials, which offer a beautiful luster and color. This material is resistant to wear and scratches, and is virtually resistant to fading caused by UV rays and moisture, making it easy to maintain its original shine even after long-term use. Furthermore, Omega fills the markings on the ceramic bezel with metal using proprietary technologies such as Liquidmetal™ or Ceragold™. Liquidmetal™ is a ceramic decoration technology that uses a high-hardness alloy composed of titanium, zirconium, and copper. Ceragold™ is also a ceramic decoration technology, both of which are unique to Omega. By fusing the two materials, they achieve a smooth surface finish while overcoming the problem of the markings fading due to wear.

　Furthermore, practicality has also been considered in the use of 18K gold. For example, there is 18K Sedna™ gold. Conventional 18K pink gold has a tendency to tarnish over time due to the copper it contains. In contrast, this gold, uniquely developed by Omega, is made by blending gold and copper with palladium, achieving a beautiful, distinctive reddish hue while simultaneously suppressing tarnishing over time. In addition to Sedna™ gold, Omega is known for its use of various alloys, including 18K Moonshine™ gold and 9K bronze gold.

Omega uses materials that contribute to both "design expression" and "maintaining the watch's aesthetic appeal for a long time." Seamaster watches made with these materials are an excellent choice for users who are concerned about "scratches" from daily use and "fading and discoloration" due to aging when wearing luxury watches on a daily basis.

A wristwatch that continues to improve practicality.

　With its Master Chronometer designation offering magnetic resistance of over 15,000 gauss, its Co-Axial escapement that minimizes wear between parts, and its aesthetically pleasing exterior materials, the Seamaster can be described as a wristwatch that pursues practicality through a technological approach to address the challenges of modern living.

　The Seamaster boasts a robust maintenance system provided by the Swatch Group and a five-year international warranty covering all models, ensuring a long-lasting and enjoyable experience. With its high precision and practicality, the Seamaster has garnered support from watch enthusiasts and other users alike, and is expected to continue its popularity.