This authentic Omega Aqua Terra watch link was removed from a new Co-Axial 150m, 39.2mm watch, but it will fit other Omega Aqua Terra models. The link is 17mm wide and includes the original Omega pin and tube required for fitting.
There are photos of your link from multiple angles.
If you are not sure if this will fit your watch or if you have any other questions, feel free to email me at Sales@TheWatchLink.co.uk . I'm happy to help!