The Rolex Oyster Perpetual Datejust is a classic and iconic timepiece known for its elegance, precision, and reliability. Changing the time on this watch is a straightforward process, but it requires attention to detail to ensure accuracy and avoid damaging the watch. This article will guide you through the process, provide tips for proper handling, and answer frequently asked questions.
Understanding the Rolex Oyster Perpetual Datejust
The Design and Features
The Rolex Oyster Perpetual Datejust is renowned for its timeless design, featuring a self-winding mechanical movement, a date display, and a waterproof Oyster case. The watch is equipped with a screw-down crown and a perpetual rotor, which harnesses kinetic energy to keep the movement running.
The Movement
The Datejust’s movement is the Rolex Caliber 3235, known for its precision and durability. It features a Parachrom hairspring and a Chronergy escapement, providing enhanced resistance to shocks and magnetic fields. The movement has a power reserve of approximately 70 hours.
The Crown Functions
The crown of the Datejust has three positions:
Screwed-down position: The crown is screwed into the case, ensuring water resistance.
Position 1 (Winding): The crown is unscrewed but not pulled out, allowing manual winding.
Position 2 (Date adjustment): The crown is pulled out halfway, allowing date adjustment.
Position 3 (Time adjustment): The crown is fully pulled out, allowing time adjustment.
Preparing to Change the Time
Gather the Necessary Tools
Before you begin, ensure you have the following tools:
A soft, lint-free cloth to place the watch on.
A clean, dust-free workspace.
A magnifying glass if needed for better visibility.
Precautions and Considerations
Avoid setting the date between 8 PM and 4 AM: During this period, the date-change mechanism is engaged. Setting the date can damage the movement.
Ensure the crown is fully unscrewed: A partially unscrewed crown may not engage the correct position.
Avoid over-winding: If manually winding the watch, avoid over-winding, as it can damage the movement.
See Also: How Do You Wind A Rolex Datejust
Step-by-Step Guide to Changing the Time
Step 1: Unscrew the Crown
Hold the watch firmly with one hand.
Use your thumb and forefinger to unscrew the crown counterclockwise.
Continue until the crown is fully unscrewed and pops out slightly.
Step 2: Position the Crown for Time Adjustment
Gently pull the crown out to the third position.
You will feel a click when the crown reaches this position.
The second hand will stop, allowing you to set the time accurately.
Step 3: Set the Time
Rotate the crown clockwise or counterclockwise to set the correct time.
Pay attention to the AM/PM setting to ensure the date changes correctly.
Avoid using force when turning the crown.
Step 4: Secure the Crown
Push the crown back to the first position.
Screw the crown clockwise until it is snug against the case.
Ensure the crown is fully screwed down to maintain water resistance.
Additional Tips for Handling Your Rolex
Regular Winding: If you do not wear your Rolex daily, wind it regularly to keep the movement lubricated.
Avoid Magnets: Keep your watch away from strong magnetic fields, which can affect its accuracy.
Cleaning: Clean your watch regularly with a soft cloth and lukewarm water. Avoid using soap or chemicals.
Common Mistakes to Avoid
Setting the Date During Restricted Hours: As mentioned, avoid setting the date between 8 PM and 4 AM.
Over-Winding the Watch: Be gentle when winding the watch. Stop winding when you feel resistance.
Improper Crown Positioning: Ensure the crown is fully screwed down after setting the time to maintain water resistance.
Frequently Asked Questions
How Often Should I Set the Time?
If you wear your Datejust daily, you may only need to set the time when traveling across time zones or during Daylight Saving Time changes.
Can I Set the Time Backwards?
Yes, you can set the time backward on a Datejust without damaging the movement. However, be gentle and avoid excessive force.
How Do I Know If the Crown Is Fully Screwed Down?
The crown should be flush with the case, with no visible gap. It should not rotate easily once fully screwed down.
What Should I Do If the Crown Feels Stiff?
If the crown feels stiff or difficult to turn, do not force it. Take your watch to a certified Rolex service center for inspection.
Conclusion
Changing the time on a Rolex Oyster Perpetual Datejust is a simple yet precise process. By following the steps outlined in this guide, you can ensure that your watch remains accurate and well-maintained. Remember to handle your watch with care, avoid common mistakes, and consult a professional if you encounter any issues.
