18.50 mm round domed sapphire crystal, height 2.77 mm, generic (not original) to fit Omega® case REF 5954, 7951000, 7951001, 7951002, 7951007, 8951000, 8951001, 8951002, 8951006. 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.