20.12 mm x 4.15 mm (height) round plastic crystal with gold colour ring, genuine 063PX5151 Omega® crystal, fits Omega case REF 5660021, 5660022
* 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.