Watch corrector and watch middle

A watch comprising:

• a watch middle;
• and
• a watch corrector,
• wherein the watch middle comprises an opening,
• wherein the watch corrector comprises a primary contour,
• wherein the watch corrector comprises a case,
• wherein said case comprises a first surface, said first surface representing a first portion of the primary contour,
• wherein a mobile element, said mobile element inserted in said case and configured to be mobile in said case,
• wherein said mobile element comprising a second surface representing a second portion of said primary contour,
• wherein, along a longitudinal axis of the case, said primary contour comprises a left-hand curve shape of which a first portion of a perimeter of the first surface is differently positioned along the longitudinal axis than is a second portion of the perimeter,
• wherein the longitudinal axis is from a first end of the case and to the second end of the case,
• wherein the first end of the case is configured to be inserted into the watch middle,
• wherein the second end of the case is, along the longitudinal axis, opposite to the first end and comprises the first surface,
• wherein the perimeter is an outer boundary of the first surface along a radial axis of the case,
• wherein the radial axis is perpendicular to the longitudinal axis,
• wherein said primary contour is formed on the first surface of the case and on the second surface of the mobile element, and
• wherein the watch corrector is inserted into the opening of the watch middle.

A watch corrector, comprising:

• a case;
• and
• a mobile element inserted into the case and mobile with respect to the case,
• wherein the case comprises a first surface at a top surface of the corrector,
• wherein the mobile element comprises a second surface at the top surface of the corrector,
• wherein the first surface and the second surface form a primary contour on the first surface of the case and on the second surface of the mobile element, and
• wherein, along a longitudinal axis of the case, the primary contour has a generally smooth shape of which a first portion of a perimeter of the first surface is differently positioned along the longitudinal axis than is a second portion of the perimeter,
• wherein the longitudinal axis is from a first end of the case and to the second end of the case,
• wherein the first end of the case is configured to be inserted into a watch middle,
• wherein the second end of the case is, along the longitudinal axis, opposite to the first end and comprises the first surface,
• wherein the perimeter is an outer boundary of the first surface along a radial axis of the case,
• wherein the radial axis is perpendicular to the longitudinal axis.