A timepiece display device comprises a timepiece body, a support plate, a timepiece driving module, a rotating optical disc, a magnetic element, a top plate, and a rotating shaft of the timepiece driving module passes through the support plate and connects to the center of the rotating optical disc to drive the rotating optical disc to rotate; a display comprises an annular base mounted in the upper chamber of the timepiece body, a dial mounted inside the annular base, an indicator element placed on the dial and corresponding to the time identifier on the dial, and a crystal covering the upper end of the annular base. The indicator element and the magnetic element are positioned by the magnetic attraction of the magnetic element, and the indicator element moves synchronously with the magnetic element to indicate the time.

Disclosed is a method for manufacturing a horological component according to which a silicon-based piece having the desired shape of the horological component is produced and the piece is subjected to a thermal oxidation and deoxidation treatment to remove a predetermined thickness of silicon in order to increase the mechanical strength of the piece. This method is characterized in that the thermal oxidation and deoxidation treatment is carried out in several steps, each step including a thermal oxidation phase followed by a deoxidation phase.

A method for colouring a part to be treated made of metal, this method including the step of implanting mono- or multi-charged ions in a surface layer of the part to be treated by directing towards this part to be treated a mono- or multi-charged ion beam produced by a source of mono- or multi-charged ions, the part to be treated changing colour under the effect of this ion implantation. A coloured metal can be obtained with the above method.

An item produced in a cermet material including by weight between 85 and 94% of a ceramic phase and between 6 and 15% of a metal binder phase, the ceramic phase mostly including a tungsten carbide phase and optionally one or more phases of one or more secondary carbides selected from the elements Ti, Zr, Hf, V, Nb, Ta, Cr and Mo, the metal binder comprising Ag, Pd, Ru and Co. The invention generally relates to the method for manufacturing said item.

A display mechanism of a watch including at least one indicator member and a drive member assembly. The indicator member is mounted to rotate about a first axis of rotation and is configured to indicate a time. The indicator member also has a second axis of rotation extending along the indicator member and a rotary element mounted to rotate about the second axis of rotation. The drive assembly includes a first drive member and a second drive member such that the first drive member drives the rotary element when it is moving about the first axis of rotation.

A method for manufacturing a luminescent timepiece component for a portable object includes producing a pre-mixture of a phosphorescent pigment in an amount of 10 to 40% by weight, a fluorescent pigment in an amount of 1 to 4% by weight and a plasticiser in a maximum amount of 10% by weight; mixing a polymer base with the pre-mixture and extruding a first time the mixture obtained to obtain a homogeneous polymer mixture; extruding a second time the polymer mixture to form a strip of a predetermined thickness; and cutting the strip to obtain the desired luminescent timepiece component.

A moon phase indicator mechanism, for a timepiece provided with a movement and a dial, the moon phase indicator mechanism including at least one moon disc, and at least one moon phase train driven by the timepiece movement, the moon phase train meshing with a moon phase wheel which carries the moon disc at least indirectly and in a fixed manner, the moon phase wheel taking the form of a toothed ring in order to move the moon disc with the moon phase train about an axis A.

A layer of lanthanum boride of stoichiometry LaB.sub.x where x is between 9 and 12 is deposited on substrate, for example a stainless steel watch dial, and subsequently treated with a laser, such that the portion(s) of the layer treated with the laser change colour according to the laser power. This produces multicoloured surfaces having high resistance to corrosion and abrasion. The layer of LaB.sub.x is deposited by PVD and by cathode sputtering, using a LaB.sub.6 target of purple-violet colour, such that the colour of the deposited layer differs from the colour of the target. The laser treatment at specific powers changes the stoichiometry of the layer in the treatment portions, such that the colour of these portions changes according to the stoichiometry obtained. At higher powers, the laser will remove the layer of LaB.sub.x. Thus the colour of the treated portions is determined by the material of the substrate.

A display mechanism (100) allowing display change with a single display mobile (150) so as to indicate a first piece of information with a first counter (110) and second piece of information with a second counter (120). This change is performed by the permutation of a clutch organ (130) displacing between a first position (131) and a second position (132) when the clutch organ (130) is controlled by a control organ (140).

A watch external part of the present invention is equipped with a substrate and a coating formed using an aerosol deposition method. The coating is selectively provided at a portion of a site observable in a state with the watch external part incorporated in a watch. The substrate is made of a material including one type or two or more types selected from a group consisting of sapphire glass, quartz, and plastic. The watch external part is further equipped with a ground layer having at least one layer between the substrate and the coating.