30.19 mm (diameter) x 2.78 mm (thick), sapphire crystal with AR coating, generic (not genuine), fits Breitling® Chronomat, reference A13356, supplied with crystal gasket. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Breitling®. Breitling® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.