A method for fabrication of a composite component including a first material containing steel 316L and a second material containing zirconia powder formed in a single sintering. The method for fabrication includes: a) forming a first injection molding composition including steel 316L powder and a second injection molding composition including zirconia powder; b) agglomerating via injection molding one of the first and second compositions to form at least a first part of a blank; c) agglomerating by injection molding the other of the first and second materials against the first part of the blank to form at least a second part of the blank; and d) non-consecutively sintering the first and second compositions forming the blank to obtain the composite component formed of steel 316L and zirconia.

A watch case (10) comprising a middle (11) to which a crystal (12) and a back (13) are fastened so as to form an internal volume, the watch case (10) including, in the internal volume, an external part component (14) whereon a stack of thin layers (15) comprising a substrate layer (150), a solid-state phase switching layer (151) inserted between a transparent encapsulation layer (152) and a spacing layer (153) separating the phase switching layer (151) from the substrate layer (150) is deposited, the phase switching layer (151) being configured so as to have a refractive index capable of varying under exposure from light rays so as to impart to the stack of thin layers (15) at least two interferential colours.

A method for fabrication of a micromechanical part made of a one-piece synthetic carbon allotrope based material, the method including: forming a substrate with a negative cavity of the micromechanical part to be fabricated; coating the negative cavity of the substrate with a layer of the synthetic carbon allotrope based material in a smaller thickness than the depth of the negative cavity; and removing the substrate to release the one-piece micromechanical part formed in the negative cavity.

A mechanical or electromechanical timepiece including a watch case delimiting an internal volume, the watch case including a back delimiting the watch case at the bottom; a crystal closing the watch case at the top, the crystal defining a useful display aperture; a middle part connecting the back and the crystal to one another; a horological movement housed in the internal volume of the watch case; at least one hand for displaying information visible via a useful display aperture and rotated with respect to the watch case by the horological movement with at least one driving belt extending at least partially in the useful display aperture, the timepiece includes the internal volume of the watch case filled with a fluid wherein at least one driving belt is submerged, and wherein the driving belt is made of a material wherein the optical refractive index is equal or substantially equal to that of the fluid.

A display system includes a watch having a watch face; and an intelligent display system. The display system includes a display panel, a selectively opaque panel, a memory having programming instructions, and a controller in communication with the display panel and the selectively opaque panel, and the memory. The display system is operable in each of: (a) display mode wherein the display panel is actuated by the controller to display image content, and at least a portion of the selectively opaque panel is opaque; (b) a transparent mode wherein the display panel does not display image content, the selectively opaque panel is substantially transparent, and the watch face is substantially visible; and (c) an augmented reality mode wherein the display panel is actuated by the controller to display image content, and the selectively opaque panel is substantially transparent, the watch face being substantially visible behind the display system.

A watch case (10) including a middle (11) to which a crystal (12) and a back (13) are fastened so as to form an internal volume, the watch case (10) including, in the internal volume, an external part component (14) whereon a stack of thin layers (15) comprising a substrate layer (150), a solid-state phase switching layer (151) inserted between a transparent encapsulation layer (152) and a spacing layer (153) separating the phase switching layer (151) from the substrate layer (150) is deposited, the phase switching layer (151) being configured so as to have a refractive index capable of varying under exposure from light rays so as to impart to the stack of thin layers (15) at least two interferential colours.

A skeleton watch includes a horological movement housed in a watch case, the horological movement being arranged to rotate at least one hand, the horological movement being covered by a dial, and the dial being disposed between the horological movement and the at least one hand. The dial includes a photochromic plate so that the horological movement is visible when the photochromic plate is exposed to an amount of UV radiation below a first threshold value and the horological movement is masked when the photochromic plate is exposed to an amount of UV radiation above a second threshold value.

A timepiece glass, in particular a watch glass, wherein it comprises an optical device comprising at least one lens intended to enlarge an indication supplied by a timepiece, said lens comprising at least one aspherical face comprising at least one section passing through a vertical plane comprising an optical axis of vertical direction z, of which at least one outline can be defined by the following equation: $z\left(r\right)=\frac{r^2}{R\left(1+\sqrt{1-\left(1-\kappa \right)\frac{r^2}{R^2}}\right)}+{\alpha }_4{r}^4+{\alpha }_6{r}^6+\mathrm{.Math.}$
in which R is the nominal radius of curvature, k is the constant of conicity, and α.sub.(4,6, . . . ) is or are coefficient(s) of asphericity, and in which at least the constant of conicity k and/or at least one coefficient of asphericity is different from zero.

A method for cutting watch crystals along a plurality of contours in a plate of transparent material includes forming a first cut line or kerf to form a first chamfer for each of the crystals of the plate and marking at least one machined recess on a first side of the plate, turning the plate over and marking at least one of the position of the first chamfer and the position of the at least one machined recess, forming a second cut line or kerf to form a second chamfer for each of the crystals on a second side of the plate, and separating the crystals by machining through the plate at each of the contours to form edges of the crystals.

A skeleton watch includes a horological movement housed in a watch case, the horological movement being arranged to rotate at least one hand, the horological movement being covered by a dial, and the dial being disposed between the horological movement and the at least one hand. The dial includes a photochromic plate so that the horological movement is visible when the photochromic plate is exposed to an amount of UV radiation below a first threshold value and the horological movement is masked when the photochromic plate is exposed to an amount of UV radiation above a second threshold value.