At least the oscillating wheel (8) from the group consisting of oscillating wheel (8), drive shaft (4) and output shaft (6) is at least partially enclosed by a housing (10).

The oscillating wheel (8) is coupled to the output shaft (6).

The invention relates to a reduction gear unit (2) with a drive shaft (4), an output shaft (6) and an oscillating wheel (8), wherein the oscillating wheel (8) comprises a first central axis (M).

According to the invention, the oscillating wheel (8) comprises a substantially ball ring-shaped first element (14) around the central axis (M).

The carrier (4) is disposed inside the outer tube (2) in the radial direction holding the oscillating gear (14).

The outer tube (2) is configured from a material with a linear expansion coefficient larger than that of the material of the oscillating gear (14).

The oscillating wheel (8) is drivable by means of the drive shaft (4) in such a manner that the first central axis (M) rotates about the axis of rotation (R).

With the invention in 1887 of the famous oscillating pinion for mechanical chronometers — still in use today — sports timekeeping is in the brand’s DNA.

Not twenty years later, he had also patented the oscillating pinion: a compact component that allowed precise engagement of the chronograph function.

Jack Heuer’s great grandfather, Edouard Heuer, patented his first chronograph in 1882, and in 1887 patented the 'oscillating pinion' still used by major watchmakers of mechanical chronographs.

Jack Heuer’s great grandfather, Edouard Heuer, patented his first chronograph in 1882, and in 1887 patented the ‘oscillating pinion’ still used by major watchmakers of mechanical chronographs.

In 1887, Edouard Heuer changed the course of watchmaking forever with the invention of the oscillating pinion, still today a key chronograph component.

Not twenty years later, he had also patented the oscillating pinion: a compact component that allowed exact engagement of the chronograph operate.

Not twenty years later, he had additionally patented the oscillating pinion: a compact part that allowed precise engagement of the chronograph operate.

Not twenty years later, he had also patented the oscillating pinion: a compact component that allowed precise engagement of the chronograph function.