![]() ![]() The escapement that Beat and his team engineered for the caliber 400 uses silicon and other non-ferrous materials where possible to minimize the adverse effects of magnetism on the movement. It’s much less complex and reduces wear and tear. Instead, we devised a much more reliable system based on the slide bearing concept that only winds in one direction. Beat Fischli, Oris’s Chief Operating Officer whose team was responsible for the caliber 400 describes the system they designed thusly: ‘ Typically, the rotating mass, or rotor, sits on a ball bearing and winds in both directions. The automatic winding system hasn’t been taken for granted, either. The net result is 5 days of reserve delivering 85% of the mainspring’s energy to the escapement, vs the 70% typically seen in automatic movements. A new wheel design is also being used that delivers power more efficiently, reducing parasitic drivetrain loss so to speak. ![]() ![]() bigger springs & barrels) required reducing torque in the mainspring to help conserve power, as well as reducing pressure on moving parts. Attaining that number without brute force (e.g. The lengthy power reserves of these movements, a very healthy 10 days, was something of a necessity, and it’s a trait retained by the caliber 400, which uses twin mainsprings to store 5 days of reserve. The biggest departure from other in-house movements we’ve seen from Oris in recent years is the move to an automatic winding system from their traditional hand-wound calibers. ![]()
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