The Rolex 1ZU 1 3135, while not a formally recognized designation by Rolex themselves, points towards a specific iteration of their legendary caliber 3135 movement. The "1ZU 1" likely refers to a specific serial number prefix or internal Rolex designation indicating a particular production run or specification. However, the core of this discussion centers on the Rolex caliber 3135 movement itself, and its comparison to other movements, particularly the ETA 2892-A2, focusing on its renowned robustness and accuracy. This article will delve into the technical aspects of the 3135, explore its superior rate stability, and touch upon related Rolex movements and models, addressing the provided categories where relevant.
The Rolex 3135 movement is a workhorse, the backbone of many of Rolex's most iconic timepieces, including the Submariner, GMT-Master II, and Datejust. Its reputation for reliability and precision is unparalleled within the watchmaking industry. A key factor contributing to its superior performance, compared to movements like the ETA 2892-A2, is the implementation of a free-sprung balance spring with a variable inertia balance wheel. This contrasts sharply with the ETA's index-regulated balance spring.
Let's unpack this difference. The ETA 2892-A2, a highly regarded movement in its own right, utilizes an index-regulated balance spring. This means that the rate (the accuracy of the timekeeping) is adjusted by moving small regulating pins on the balance spring. While effective, this method can be less precise and more susceptible to changes in temperature and position. Slight alterations to the balance spring's geometry during regulation can also affect its long-term stability.
The Rolex 3135, on the other hand, employs a free-sprung balance spring with a variable inertia balance wheel. This ingenious system allows for incredibly fine adjustments to the rate without physically altering the balance spring itself. The variable inertia balance wheel features small weights (often gold screws) that can be moved along the rim of the balance wheel. By adjusting the position of these weights, the moment of inertia of the balance wheel is altered, thus changing the rate. This method provides significantly more precise and stable regulation. The free-sprung balance spring further enhances this precision by eliminating the need for index regulation, allowing the spring to oscillate more freely and consistently.
This superior regulation mechanism contributes directly to the 3135's enhanced robustness in terms of rate stability. It remains more accurate across varying temperatures, positions, and over longer periods, a testament to Rolex's dedication to precision engineering. This is not simply a matter of marketing; independent testing and real-world experience consistently demonstrate the 3135's superior long-term accuracy compared to the ETA 2892-A2. The difference might seem subtle on paper, but over the lifespan of a watch, it translates into significantly more reliable timekeeping.
Now, let's address the provided categories:
Rolex 3131 18k price: The Rolex 3131 movement, while related to the 3135 (both are in-house Rolex movements), is a different caliber altogether. It's primarily found in certain Daytona models, often in 18k gold variants. The price of a Rolex Daytona with a 3131 movement in 18k gold varies significantly based on the specific model, condition, and market demand. Expect to find prices ranging from tens of thousands to hundreds of thousands of dollars. The gold content significantly increases the overall cost.
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