Mechanical clock movement with magnetic escapement

A mechanical clock movement comprising:

• a resonator;
• an escapement linked to the resonator;
• and
• a display of at least one item of time information, wherein the display is driven by a mechanical drive device via a counter wheel train, work rate of which is set by the escapement;
• wherein at least the resonator is housed in a chamber, in which a reduced pressure in relation to atmospheric pressure prevails;
• wherein the escapement is a magnetic escapement comprising an escape wheel coupled directly or indirectly to the resonator via a magnetic coupling system, wherein the magnetic coupling system includes at least one first magnetic element and a second magnetic element that exhibit a magnetic interaction at least periodically between them;
• and
• wherein the chamber comprises a wall, which runs between the first and second magnetic elements so that the first magnetic element is inside the chamber, whereas the second magnetic element and the escape wheel are outside the chamber, and the wall is arranged to permit the magnetic interaction through the wall.