![]() ![]() The Datejust 41 (ref 126300) was among the first watches to receive the sumptuous new Rolex calibre 3235. Rolex doesn't exactly have a single "most accurate" timepiece - instead, it tests all of its watches in-house, ensuring they meet extremely stringent standards for reliability and precision, with a minimum accuracy of +/- 2 seconds per day. ![]() The Datejust is not known for being particularly high-tech or sporty, and that's exactly what we like about this incredible watch. Now that you have a general idea on accuracy, let us present to you some watches with precision that horologists have managed to achieve by purely mechanical means. This is also a simple procedure but does require more time as each position would need to be monitored and adjusted. Here, the balance wheel would be adjusted to compensate for the different positions. It’s actually one of the most common tasks performed in our own CHRONEXT watchmaking atelier.Īdjustment: This is mainly for watches that run slow or fast but not consistently, especially in different positions. A qualified watchmaker can perform this task in a few minutes with the right equipment. This is quite simple and can be done quickly by turning a screw. Regulation: If your watch is running either fast or slow consistently, the solution would be to regulate the beat rate accordingly. Should you find your watch running slow or fast after the initial few weeks, you can either go for a regulation or an adjustment. Even then, a simple regulation can fix it.Ī new mechanical watch will take a few weeks before finding its momentum and keeping time ‘accurately.’ This is usually so that the lubricants that are inside the watch can be distributed evenly. Changing temperatures can expand or contract some parts of the watch, however in many modern watches, they are designed in such a way to compensate for this unless the watch is subjected to extreme changes in the weather. However, you can experiment yourself to find the ideal position.įurthermore, temperature is also a key factor. Generally, we recommend placing it flat with the dial facing up. When you take your watch off at night, you can try different positions to find the ideal one. An adjusted watch should perform overall within the specification when worn throughout the day. The watch will gain or lose time when resting in a single position as a result of gravity, this is when the balance wheel comes into play as it adjusts to compensate for losses and gains in different positions. How you wear your watches plays a vital role and the accuracy can vary day by day. However, when it comes to accuracy, there are more factors to take into consideration. Mechanical watches have their own intricate charm though. If you’re after a precision watch, this is not an ideal situation for you. ![]() ![]() The opposite is in fact true: This is not a precise watch and is merely a matter of having been lucky and having looked at the watch at the right moment. After five days, the watch would appear to be synchronised exactly to the time standard, and you may feel like you have an accurate watch. The next day, it may be +8, then +10, then -5, then -7, then +4. Its daily rate variation on one day may be -10 seconds. If you have a watch with a stable rate, then you can call it a precision watch. Essentially, it does not tell us whether the time is accurate or not, rather if it consistent. Rate stability, tell us how a timekeeping device can produce time with the same accuracy over a certain time interval. If a watch is synchronised exactly with Coordinated Universal Time (UTC), which is the reference point for other timezones, and is 1.3 seconds fast a day later, then the watch is accurate to within 1.3 seconds per day. We measure the performance of a timekeeping device based on two factors: Firstly, it’s accuracy, and then on rate stability. On the contrary, they both have completely different meanings. Often people say that a watch is precise or accurate and it is generally understood to mean the same thing. But what is actually meant by the term "accuracy"? One of the first things to note is that "accuracy" and "precision" are not interchangeable. ![]()
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