Since its introduction in 2020, the Oris Caliber 400 has slowly been making its rounds throughout the wide ranging catalog of Oris watches. Their relatively new in-house movement can now be found within the 41.5mm Aquis diver and the sleek ProPilot. The Caliber 400 has also expanded into a series of movements that include the Caliber 401 found in the latest Carl Brashear Divers 65 and the Caliber 403 found within the Big Crown Pointer Date. But the movement that started it all has yet to find its way into a non-limited version of Oris’ venerable Divers 65, until now. Today, Oris debuts the Divers 65 12H Caliber 400, which includes their “New Standard” in-house movement packaged in a familiar vintage diver with more of a contemporary feel.
It’s been awhile since we’ve covered the Oris Caliber 400 so here’s a bit of a refresher on their latest series of in-house movements. The Caliber 400 was the follow up to Oris’ first in-house movement in the Caliber 110, which was a manual-wind movement that boasted a 10 day power reserve and a single large mainspring barrel. The Caliber 400 however, is an automatic movement powered by a more efficient system through a pair of twin mainsprings and a new wheel design. The result is a movement that is equipped with a 5 day power reserve. The Caliber 400 also uses a silicon lever and balance wheel, bolstering its resistance to being magnetized. In fact, its anti-magnetic properties blow the ISO 764 standards out of the water, with the Cal. 400 showing a deviation of less than 10 seconds per day after being exposed to a 2,550 gauss magnetic field. And although not certified, the in-house movement adheres to COSC standards, maintaining time within -3/+5 seconds per day. Now take all of that, and throw in a 10 year service interval, and you’re presented with a pretty strong case for a “buy once, cry once” watch with the Divers 65 12H Caliber 400.