How to Use a Moon Phase Watch

A moon phase watch is a beautiful and elegant timepiece that displays the current phase of the moon on its dial. It is a popular choice among collectors and watch enthusiasts for its intricate and detailed design. However, reading a moon phase watch can be a little tricky if you're not familiar with its features. In this article, we will guide you through the process of reading a moon phase watch.

Step 1: Identify the moon phase sub-dial

The moon phase sub-dial is a small circular window on the dial of the watch that displays the current phase of the moon. It is usually located at the 6 o'clock position on the dial and features a detailed depiction of the moon. This can be seen highlighted below on a Windsor Moonphase watch reference GS05428/06.

Step 2: Understand the moon phase display

The moon phase display on a watch shows the current position of the moon as it orbits the earth. It is represented by a small image of the moon that appears to change shape over time. The phases of the moon include new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, and waning crescent.

Step 3: Set the moon phase indicator

To set the moon phase indicator, pull the crown out to the second position and turn it clockwise or counter clockwise until the moon phase indicator shows the correct phase of the moon for your location and the current date. Most moon phase watches are accurate for about 2.5 years before needing to be adjusted. By pulling the crown out to the first position, you can then adjust the time, day and date. The month can be adjusted using the small pusher at 2 o’clock.

Step 4: Read the moon phase sub-dial

To read the moon phase sub-dial, simply look at the image of the moon and note the shape that is closest to the moon phase indicator. This will give you an approximation of the current phase of the moon.

The accuracy of the moon phase display can be affected by factors such as the position of the watch and the gravitational pull of the moon. It is important to adjust the indicator periodically to ensure accuracy.

Reading a moon phase watch may seem complicated at first, but with a little practice, it becomes second nature. Follow the steps outlined above, and you'll be able to enjoy the beauty and functionality of your moon phase watch for years to come.