FS I have an original acrylic crystal #063PZ5031L. It has the yellow gold colored tension ring and the magnification lens (on the underside) for the date window. Of course being an original Omega part, the crystal is signed with an etched Omega logo at the center. This will fit vintage Seamasters such as the 166.010 or 168.024 (chronpmeter version) The crystal is new, unused, but the package has been opened. Any marks you see are dust particles on the cryatal, not scrarches or nicks. $35 with free shipping anywhere in the USA. International shipping is additional $10, PayPal fees included. Thank you for looking. I have good references here, at WUS, on RF (as Juggernaut) and on eBay where I have 100% positive feedback as Beetledan.