CRYSTAL LIFT
Product details
Description
VIGOR CRYSTAL LIFT RM 590365X
Crystal measurement guide Measure diameter and thickness for a correct press fit, and compare acrylic, mineral glass and sapphire.
Crystal measurement guide
How to measure a watch crystal for replacement: the diameter and thickness that give a correct fit, and how to choose between acrylic, mineral glass and sapphire.
Measure the diameter
Use a digital caliper or micrometer and measure a round crystal in two or three places across the centre, reading to the nearest hundredth of a millimetre. A small difference is enough to make a press fit too loose or too tight. If the crystal is missing or broken, measure the opening in the case instead, and note whether the crystal seats in a gasket or a groove.
Check the thickness and profile
Measure the thickness at the centre of the crystal and note the profile: flat, domed or stepped edges change how the crystal sits in the case. A crystal that is the right diameter but the wrong profile will not seat evenly.
Before you order
Confirm the seating method, the gasket size where one is used, and the clearance over the hands. The collections below cover the crystals we stock.
Choose the material
| Material | Working traits |
|---|---|
| Acrylic | Softest of the three materials. Scratches can often be polished out, and it flexes rather than shatters on impact. |
| Mineral glass | Harder than acrylic with good shatter resistance. Scratches are harder to remove. |
| Sapphire | The hardest and most scratch-resistant option. It can reflect glare unless it carries an anti-reflective coating. |