The other two watches also use a new movement which is the Spring
link Drive caliber 9R31. This caliber is similar in broad strokes to
link the 9R02 however instead of the 9R02's
link complex bridgework there is a full-plate architecture. The Torque Return System is omitted in the 9R31 which has a lower power reserve than 9R02 a still-respectable 72 hours. Cases are gold or steel and slightly thicker than the platinum models at 10.2mm.