28.50 mm round domed sapphire crystal, height 2.50 mm, generic (not original to fit Omega® case REF 1681501, 1681601, 1681611, 1681614, 1681621, 1681624, 16891625, 1961501, 2681501, 2961501, 3681501, 3961501. 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.