Date magnifiers

Choosing and fitting a date magnifier

Choosing a lens comes down to two criteria: its shape and its size. Match the shape of the original lens (round, rectangular or bullet), then measure it with a caliper, or measure the date window instead. The lens should fully cover the window without hiding the neighbouring indexes.

Fitting is done with crystal glue such as GS Hypo Cement, whose fine applicator lets you apply a minimal amount. Clean and degrease the crystal and the lens, apply a very small drop, position the lens centred and aligned over the window, then let it dry without handling the watch.

• Measuring guide: measuring with a caliper
• Crystal materials: types of watch crystal
• Crystal to replace: find my crystal tool