Device for adjusting a retrograde timepiece display

A retrograde timepiece display mechanism, comprising:

• a main plate;
• and
• at least one rack pivotally mounted on a first arbor pivoting about a first pivot axis and comprising a toothing centred on the first pivot axis, the at least one rack including a sensing finger arranged to follow a periphery of a cam comprised in the retrograde timepiece display mechanism and which is pivotally mounted on a second arbor pivoting about a second pivot axis,
• wherein a position of the first pivot axis and/or of the second pivot axis is adjustable with respect to the main plate with an adjustment plate carrying the first arbor and/or the second arbor, respectively, and is movably mounted with at least one degree of freedom with respect to the main plate, and
• wherein the position with respect to the main plate is adjustable by an adjustment control means, in order to adjust a total angle of the retrograde timepiece display mechanism.