- The jump should take place precisely on the hour, with a maximum tolerance of ten seconds.
- The hour number should not creep or stagger into the window, but leap into the exact center of the window in the blink of an eye.
- The force required for this to happen, which is supplied by the same barrel as the rest of the watch movement, could not be permitted to interfere with the smooth running of the movement.
MeisterSinger developed a module to be built for the tried-and-tested Swiss automatic ETA-2824-2 movement, which successfully fulfils these requirements. The finely balanced mechanism ensures a punctual and precise jump. The tension for the switching arm of the hour disc is provided over the course of the 60 minutes by a screw attached to the minute wheel; power is therefore withdrawn from the barrel continuously rather than abruptly, and the impact on the movement is only very slight.
Movement: ETA 2824-2 with jumping hour construction, 38-hour power reserve
Case size: 40 mm
Case: stainless steel, open casing back, water resistance 5 bar, sapphire glass
Variants: white, ivory, anthracite, blue