Sometimes your watch crystal will get scratched or damaged and need to be replaced. With this guide from Esslinger.com you can learn how to measure your existing crystal to find the correct size replacement.
Tools Needed:
- Digital Gauge
- A Notebook
- A Flat Working Surface
Step 1
Lay the watch out flat on your work surface so that the watch crystal is facing up to the ceiling.
Step 2
Next take your digital gauge and open the jaws wide enough to reach past both edges of the watch crystal. Hold it over the watch crystal. Slowly close the jaws around the crystal so that the tips of the jaws are recording the distance from the twelve o’clock position to the six o’clock position. Make sure that you are measuring the bottom edge of the crystal as close to the metal bezel around it as you can get. Note the first measurement.
Be aware that your crystal might be slightly worn down or angled from wear and tear and consider adjusting your measurement to add a tenth of a millimeter to the measurement to account for this.
With a round crystal, you will need to take another measurement to guarantee that you have found the correct diameter.
Step 3
Turn the watch case around. Open the jaws of your digital gauge wide again and slowly close them around the crystal, this time measuring from the three o’clock position to the nine o’clock position on the dial. This measurement should match the first measurement you recorded.
Step 4
Finally, you must estimate the thickness of your watch crystal. Pick up the watch case and hold it horizontally in your hand. Take your digital gauge and line up one jaw with the top of the metal of the watch case. Close the jaws so that you can estimate the height of the crystal where it rises above the metal case.
Be sure to make a note at this point if your crystal is dramatically domed.
Finished
Once you have these measurements in hand, you can order a new crystal. To learn how to fit a crystal into your watch case, you can check out our Learning Center today.
Step 4 instructs to measure the height of the crystal. I have not seen in your (or any) catalog a crystal listing that includes dome height. They list “low dome”, “high dome”, “ultra high dome”. I assume my crystal is “high dome” because it has a sweep seconds hand, but it would be great if you could explain how “high” and “low” domes translate to heights of actual crystals for different diameters.
Step 4 instructs you to measure the Thickness of the crystal, not the height – but, yes it would be great if the manufacturers would measure and explain the heights of domed crystals.
I have a rectangle watch face I’m trying to find out how do you measure the rectangle watch on a rectangle watch face the measurements from 12 to 6 is 32 mm from 9 to 3 it’s 24 mm and the glass thickness is 1 mm
i want to order the crystal for Rolex Air king 34 mm. Ref 6552. could you please give me the part number
Please use our watch parts inquiry form found here: https://www.esslinger.com/watch-parts-inquiry/
Someone in the parts department will research your watch with the given information and get back to you as soon as they can with a price and availability of the parts you are looking for and answer any questions you may have.