27.40 mm x 24.20 mm Y-shaped plastic cylinder crystal, generic (not original), curved 12 to 6 and 3 to 9, to fit Omega®. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Omega®. Omega® warranty does not apply to parts supplied by H. & W. Perrin Company Limited.