Position-setting and marking device for a timepiece mechanism

A device (100) for setting the position and marking the said position, capable of immobilising a first component (1) and a second component (10) of a timepiece mechanism (500) relative to one another, the said first component and the said second component (1, 10) being arranged so as to be assembled with one another with a single degree of freedom in rotation and/or translation, and so as to be immobilised with each another by the cooperation of a first screw (4) with a first tapping (12) of the second component (10) arranged opposite a first notch (12) of the first component (1), the position-setting and marking device (100) being characterised in that the first component and the second component (1, 10) are arranged to be immobilised with each other by the cooperation of a second screw (5) with a second tapping (13) of the second component (10) arranged opposite a second notch (3) of the first component (1), said first notch and second notch (2, 3) defining a setting range according to the single degree of freedom, and in that said first screw (4) is arranged, when subjected to a first tightening torque, to create friction allowing a setting of the relative positioning between the first component and the second component (1, 10) according to the single degree of freedom, and, when subjected to a second tightening torque greater than said first tightening torque, to immobilise said the first component and the said second component (1, 10) in position with each other, and further characterised in that the second screw (5) is a screw with a non-flat head capable of imprinting a mark on the edge of said second notch (3) when it is subjected to a third tightening torque, the imprint being representative of the imposed position of the first component and second component (1, 10) relative to each other.