34.50 mm x 3.50 mm (height) round mineral crystal, genuine 063TN5166 Omega® crystal, fits Omega® case REF 1660066, 1660092, 166066, 166092
* 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.