28.25 mm x 27.25 mm x 2.00 mm thick T-shape domed top flat bottom sapphire crystal with a calendar bubble at the 3 o'clock position, generic (not genuine), fits Cartier® Men's Roadster. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Cartier®. Cartier® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.