26.80 mm x 17.50 mm x 0.80 mm (thick), rectangular sapphire crystal, generic (not original), to fit Franck Muller®.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Franck Muller®. Franck Muller® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.