This is the Case Back Crystal with Gemini IV patch image fitted to the Speedmaster Limited Edition Gemini IV 40th Anniverssary Panda model.
These are Omega supplied service case back crystals for the 3565.80.00.
This was fitted to the model stated above but you can exchange it for the crystal in a 3573.50 etc sapphire case back if you want to modify your watch with this beautiful crystal.
Omega Speedmaster Limited Edition GEMINI IV Case Back Crystal
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.