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Omega Speedmaster Moonwatch Moonphase Chronograph Review

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The Omega Speedmaster Moonwatch Moonphase Chronograph (model number 304. is a remarkable timepiece that combines practicality with romantic refinement. Encased in durable stainless steel, this watch features a brown dial and is paired with a matching brown alligator strap. Its impressive array of features includes hours, minutes, small seconds, date, chronograph, and moon phase complications. With a thickness of 17.1mm and a lug-to-lug measurement of 49.5mm, this watch offers a compact yet eye-catching design. Whether you’re a watch enthusiast or simply appreciative of luxury timepieces, the Omega Speedmaster Moonwatch Moonphase Chronograph is certainly worth exploring.

For more in-depth information and a comprehensive review, you can watch the full Omega Speedmaster Moonwatch Moonphase Chronograph review by Tim Mosso. If you’re interested in purchasing this exceptional watch or have any questions about it, feel free to reach out directly to Tim at Additionally, you can visit for the latest arrivals of pre-owned luxury watches and find industry-leading value in previously loved timepieces.

Case and Design

Omega Speedmaster Moonwatch Moonphase Chronograph Review

Size and Dimensions

When it comes to the size and dimensions of a watch, it is important to consider both aesthetics and practicality. A larger watch may make a bold statement on the wrist, while a smaller watch may be more understated and classic. The size and dimensions of a watch can vary greatly depending on the brand and model.

It is crucial to choose a watch size that suits your wrist size and personal style preferences. A watch that is too large for your wrist can appear bulky and overwhelming, while a watch that is too small may not make the desired impact. To determine the right size for you, consider the diameter of the watch case and the thickness of the watch itself.


The materials used in the construction of a watch play a significant role in its overall quality, durability, and aesthetic appeal. High-end watches are often made from premium materials such as stainless steel, titanium, gold, or platinum. These materials not only enhance the durability of the watch but also add a touch of luxury.

Stainless steel watches are popular due to their resistance to corrosion, affordability, and versatility. Titanium watches offer exceptional strength while being lightweight, making them suitable for active individuals. Gold and platinum watches are considered luxury timepieces, known for their elegance and prestige.

The choice of materials also extends to the watch strap, where options may include leather, rubber, fabric, or metal bracelets. Each material offers distinct advantages and can greatly influence the overall design and comfort of the watch.

Crown and Pushers

The crown and pushers of a watch are vital components that allow the wearer to interact with the watch’s functions. The crown, usually located on the side of the case, is used for setting the time, date, and other complications. It can be manually rotated or pulled out to different positions for different functions.

Pushers, on the other hand, are additional buttons often found on the side of the case and are used to control specific complications, such as starting and stopping a chronograph. The design and positioning of the crown and pushers can vary greatly depending on the watch model and manufacturer.

It is important to consider the ease of use and functionality of the crown and pushers when selecting a watch. The crown should be easily accessible and comfortable to operate, while the pushers should provide a satisfying click when pressed. Additionally, some watches offer water resistance features by incorporating screw-down crowns or pushers.


The bezel of a watch refers to the ring or outer edge surrounding the dial. It serves both functional and aesthetic purposes. Functionally, the bezel can be used to track elapsed time, calculate speed, or indicate a second time zone. Aesthetically, the design of the bezel can greatly enhance the overall look and feel of the watch.

There are different types of bezels commonly found in watches, including fixed bezels, rotating bezels, and tachymeter scales. Fixed bezels are stationary and do not rotate, while rotating bezels can be manipulated to measure elapsed time or indicate other useful information. Tachymeter scales, often found on chronograph watches, allow the wearer to measure speed based on the time it takes to travel a known distance.

The material and finish of the bezel can also vary, with options such as ceramic, aluminum, or precious metals. These choices can significantly impact the durability and aesthetics of the watch.


The dial, also known as the face of the watch, is where time and other complications are displayed. It is a critical element in the overall design and legibility of the watch. Dials can come in a wide variety of styles, including minimalist, textured, and multi-layered designs.

The choice of materials for the dial can greatly impact its visual appeal. Common materials used for dials include metals, such as brass or silver, or materials with specific finishes, such as enamel or mother-of-pearl. The dial may also feature hour markers, numerals, or complications such as sub-dials for additional functionalities.

Legibility is a crucial consideration when selecting a watch dial. Clear and well-contrasted hour markers, hands, and complications ensure that time can be easily read at a glance, even in various lighting conditions.

Strap and Clasp

The strap and clasp of a watch not only contribute to its overall comfort but also play a key role in its visual presentation. The strap options can range from leather, rubber, fabric, to metal bracelets, and each offers a different level of durability and style.

Leather straps are known for their timeless elegance and comfort, but they may require regular maintenance and have limited water resistance. Rubber and fabric straps are often preferred for their durability and versatility, especially in sports or casual watch designs. Metal bracelets, typically made of stainless steel or precious metals, offer durability and a more formal and sophisticated look.

The clasp, which secures the strap around the wrist, can come in various forms, including traditional buckles, deployant clasps, or folding clasps. The choice of clasp depends on personal preference, ease of use, and overall aesthetics.

Movement and Complications

Quick Set System

The quick set system is a feature found in many modern watches that allows for the convenient adjustment of complications, such as the date or the day of the week. Instead of manually turning the crown multiple times to reach the desired date, the quick set system simplifies the process by allowing the wearer to advance the date or other complications rapidly.

This feature is especially useful for watches with complex calendars that require frequent adjustments, as it saves time and eliminates the risk of damaging the movement by setting the date incorrectly.

Hacking or Stop Seconds Function

The hacking or stop seconds function is a mechanism that stops the movement of the watch when the crown is pulled out to set the time. This feature ensures precise time setting by allowing the wearer to synchronize the watch with a reference time source, such as an atomic clock or another accurate timekeeping device.

By stopping the movement, the hacking function eliminates any errors that may occur when setting the time while the seconds hand is still moving. This is particularly important for individuals who require exact time synchronization, such as pilots or professionals working in highly regulated environments.


The chronograph function is one of the most popular complications found in watches. It allows the wearer to measure elapsed time accurately and can be used for a variety of purposes, including timing sports events or tracking personal records.

A typical chronograph watch features two or three sub-dials on the main dial, which measure hours, minutes, and seconds. Additionally, some chronographs may include a tachymeter scale on the bezel or dial, which enables the wearer to calculate speed based on the time it takes to travel a known distance.

The chronograph mechanism in a watch can be either manual-winding or automatic. Manual-winding chronographs require the user to manually wind the watch to provide power for the chronograph function, while automatic chronographs are self-winding and draw power from the wearer’s wrist movement.

Moon Phase

The moon phase complication is a romantic and visually captivating feature found in certain watches. It depicts the current phase of the moon as seen from Earth. The moon phase indicator typically consists of a disc with two moons, one dark and one light, which rotate to simulate the waxing and waning of the moon.

While the moon phase function serves primarily as an aesthetic embellishment, it also provides a connection to astronomical timekeeping traditions and can be appreciated by those with an interest in celestial phenomena.

Date Indicator

The date indicator is a common complication found in many watches. It allows the wearer to easily track the current date of the month without requiring manual calculation. The date window is often located at the 3 o’clock or 6 o’clock position on the dial, and it displays the date in a numerical format.

Different watch models may offer variations of the date indicator. Some watches include a magnification window, commonly known as a cyclops, which enhances the readability of the date by enlarging the numerals. Others may feature a retrograde date display, where the date hand moves along an arc and resets to the starting point at the end of each month.


At the core of every watch is its timekeeping function. This fundamental feature ensures that the watch accurately measures and displays the current time. Timekeeping mechanisms can vary depending on the type of movement used in the watch.

The most common types of watch movements are quartz and mechanical. Quartz movements use a battery to power a tiny quartz crystal that vibrates at a precise frequency, providing exceptionally accurate timekeeping. Mechanical movements, on the other hand, rely on a complex system of gears, springs, and oscillating weights to keep time.

Mechanical movements can be further divided into two categories: manual-winding and automatic. Manual-winding movements require the wearer to manually wind the watch regularly to ensure its accuracy, while automatic movements are self-winding and draw power from the wearer’s wrist movement.

Functional Features

Water Resistance

Water resistance is a crucial feature for those who lead an active lifestyle or who simply want peace of mind that their watch will remain unaffected by water exposure. The water resistance rating of a watch indicates the depth to which it can be submerged without water entering the case and damaging the movement.

Water resistance is typically measured in meters or atmospheres (ATM). A watch may be classified as water-resistant, but it is important to understand the specific limitations of each rating. For example, a watch with a water resistance rating of 50 meters means it can withstand water splashes and brief immersion but is not suitable for swimming or diving.

It is important to note that water resistance can deteriorate over time due to wear and tear or improper handling. Regular maintenance and adherence to manufacturer guidelines are key to maintaining the water resistance of a watch.

Winding System

The winding system of a watch refers to the method by which the watch is powered, particularly with manual-winding or automatic movements. Manual-winding watches require the wearer to manually wind the crown to provide power to the movement. This is typically done by rotating the crown clockwise until resistance is felt.

Automatic watches, also known as self-winding watches, eliminate the need for manual winding by utilizing a rotor or oscillating weight that winds the mainspring with the motion of the wearer’s wrist. This allows the watch to remain powered as long as it is worn regularly.

The choice between manual-winding and automatic watches depends on personal preference and lifestyle. Some individuals prefer the ritual of manually winding their watch, while others appreciate the convenience of an automatic movement that winds itself.

Power Reserve

The power reserve of a watch indicates the length of time the watch can operate without being wound or worn. It is an essential feature to consider, especially for those who may not wear their watch consistently or for extended periods.

The power reserve varies depending on the type of movement and the specific watch model. Quartz watches typically have a longer power reserve, often lasting several years, due to their low energy consumption. Mechanical watches, both manual-winding and automatic, usually have a power reserve ranging from 24 to 72 hours, although some high-end models can offer extended power reserves.

The power reserve indicator, if present, provides a visual indication of the remaining power in the watch. This feature allows the wearer to gauge when the watch needs winding or wearing before it stops running.

Anti-Magnetic Features

Magnetic fields can have a detrimental effect on the accuracy and performance of a mechanical watch movement. Thus, anti-magnetic features have become increasingly important in modern watches. Anti-magnetic watches are designed to resist the harmful influence of magnetic fields, ensuring accurate timekeeping even in high-magnetic environments.

Typically, anti-magnetic watches utilize special alloys, such as silicon or Nivachron, which exhibit strong resistance to magnetic fields. These materials are used in key components of the movement, such as the hairspring, pallet fork, and escapement, to shield the sensitive parts from magnetism.

The level of anti-magnetic protection is often indicated by the watch’s resistance to a specific magnetic field strength, measured in gauss or tesla. The higher the resistance, the more reliable the watch will be in magnetic environments.

Shock Resistance

Shock resistance is an essential feature for watches, especially for those worn during physical activities or sports. The internal components of a watch, such as the balance wheel and escapement, are delicate and can be easily damaged by sudden impacts.

To ensure durability and longevity, watch manufacturers incorporate shock-resistant mechanisms into their timepieces. These mechanisms are designed to protect the movement from sudden shocks and vibrations, preventing the delicate components from dislodging or becoming misaligned.

One of the most well-known shock resistance systems is the Incabloc system, which utilizes a spring-loaded mounting for the balance wheel to absorb shocks. Other manufacturers may have their own proprietary shock resistance systems, each designed to offer a similar level of protection.

Coaxial Escapement

The coaxial escapement is a significant advancement in mechanical watchmaking introduced by renowned watchmaker George Daniels and later adopted by Omega. This innovative mechanism reduces friction and improves the efficiency of the watch movement, ultimately resulting in enhanced accuracy and extended service intervals.

Traditionally, watch escapements consisted of a lever and escape wheel that relied on lubrication to minimize friction. The coaxial escapement, however, utilizes an additional mechanism that reduces friction and eliminates the need for frequent lubrication.

The reduced friction within the escapement mechanism improves the overall timekeeping performance of the watch, as it minimizes the impact of external factors such as variations in temperature or the effects of wear over time.

Master Chronometer Certification

The Master Chronometer certification is a designation awarded by Omega to watches that meet a stringent set of requirements regarding precision, magnetic resistance, and overall performance. This certification is a testament to the high-quality standards established by Omega and ensures that the watch has undergone rigorous testing and meets the highest industry benchmarks.

Master Chronometer watches are subjected to extensive testing, including accuracy tests in various positions and under different temperatures, resistance to magnetic fields of up to 15,000 gauss, and durability tests to ensure long-term performance. Each watch must also pass the stringent criteria set by the Swiss Federal Institute of Metrology (METAS).

The Master Chronometer certification offers watch enthusiasts the assurance that they are investing in a timepiece that has been thoroughly tested and meets the highest standards of reliability and precision.


When selecting a watch, considering both the case and design, as well as the movement and functional features, is crucial to finding a timepiece that suits your style, preferences, and practical needs. The size and dimensions, materials, crown and pushers, bezel, dial, strap and clasp all contribute to the watch’s overall aesthetic appeal and comfort. Meanwhile, the movement and complications, such as the quick set system, hacking or stop seconds function, chronograph, moon phase, date indicator, and timekeeping, offer various functionalities and enhance the watch’s versatility. Lastly, the functional features, including water resistance, winding system, power reserve, anti-magnetic features, shock resistance, coaxial escapement, and Master Chronometer certification provide added practicality, durability, and reliability. By understanding these key aspects of a watch, you can make an informed decision and find a timepiece that not only looks impressive on your wrist but also meets your personal and functional requirements.

I'm, your trusted guide to the captivating world of horology. At Mt. Watches, I am dedicated to providing you with a wealth of knowledge and resources when it comes to timepieces. Regardless of your expertise level, whether you're just starting your horological journey or have a refined taste for luxury watches, I have tailor-made content for you. My comprehensive guides, informative how-to articles, and expert reviews are carefully curated to enlighten, educate, and inspire you. From delving into the complexities of watch mechanics to staying updated on the freshest trends in luxury wristwear, your exploration of time begins and reaches the pinnacle of wisdom here at Mt. Watches.

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