This is the Mineral Crystal fitted to the Flightmaster Speedmasters.
These are Omega supplied service crystals for the 145.026.
This was fitted to the models stated above.
063tn5146 Omega Speedmaster Flightmaster Mineral Crystal 145.026
Items can only be returned if either faulty, in the case of the item not being required then it must be returned exactly as received. For example if the item is new in a sealed packet and/or has protective covers in place then it must be returned the same otherwise item is no longer new and the value is greatly reduced, these items can only be returned/refunded by agreeing a lower value with Swiss Limited Editions before returning reflecting the new lower value of the item.