The 8500 equipped with Co-Axial Escapement for “greater precision, stability and durability” according to the Omega website.
Is the Omega caliber 8500 in-house?
This questions reappears constantly in the watch community. Omega calls the 8500 and in-house movement, however, many enthusiasts are hesitant in giving this designation to the movement since the movements are apparently made by ETA with Omega (Co-Axial) designs and technology. But ask yourself this, if the conglomerate Swatch Group owns Omega and also owns ETA, does that mean any proprietary movements made by ETA for Omega could be considered “in-house” since they basically live under the same roof (Swatch)?