21.00 mm round domed sapphire crystal, height 3.97 mm, generic (not original) to fit Omega® case REF 7951011, 7951012, 7951017, 8951011, 8951012, 8951018. 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.