Shock indicator device for a watch, internal to the watch, including a structure, to which is fixed an inertia block by means of at least one connecting element made of elastic or ductile or breakable material, which is elastically and plastically deformable when movements are imparted to the inertia block, this inertia block being movable in proximity to a fixed opposing surface comprised in the structure itself or in another element of a watch case, and arranged to come into contact with this opposing surface, to impart a proof indicator of impact or a permanent deformation or damage to the inertia block and/or to the connecting element and/or to the opposing surface, and/or to a breakable element incorporated in the shock indicator device), when the acceleration imparted to this inertia block is higher than a given acceleration threshold.

A pivot arbor for a timepiece movement includes a pivot made of a first non-magnetic metal material at at least one end in order to limit the sensitivity to magnetic fields. An outer surface of the pivot is coated with a first layer of a second material such as Ni, NiB, and/or NiP. The first layer of the second material is partially coated with a second layer of a third material selected from gold, silver, copper, platinum, rhodium, palladium and their alloys.

A wristwatch includes an outer case that comprises an opening portion, a windshield glass disposed in the opening portion, a crown arranged at a side surface of the outer case, a bezel arranged around the windshield glass, a protective member fixed to a side surface at which the crown of the outer case is disposed, wherein the protective member has a notch portion that covers at least a portion of a side surface of the outer case and at least a portion of a side surface of the bezel and exposes the crown.

A balance spring for a balance with a blank containing: niobium: the remainder to 100 wt %, titanium: between 40 and 60 wt %, traces of elements selected from the group formed of O, H, C, Fe, Ta, N, Ni, Si, Cu, Al, between 0 and 1600 ppm by weight individually, and less than 0.3 wt % combined, a step of β-quenching the blank with a given diameter, such that the titanium of the alloy is essentially in solid solution form with β-phase niobium, the α-phase titanium content being less than or equal to 5% by volume, at least one deformation step of the alloy alternated with at least one heat treatment step such that the niobium and titanium alloy obtained has an elastic limit higher than or equal to 600 MPa and a modulus of elasticity lower than or equal to 100 GPa, a winding step to form the balance spring being performed prior to the final heat treatment step, prior to the deformation step, a step of depositing, on the alloy blank, a surface layer of a ductile material such as copper, the surface layer of ductile material being retained on the balance spring, the thermoelastic coefficient of the niobium and titanium alloy being adapted accordingly.

The invention relates to a pivot arbor comprising a metal pivot (3) at each of its ends. The metal is a non-magnetic aluminium alloy in order to limit its sensitivity to magnetic fields, and at least the outer surface (5) of one of the two pivots (3) is deep-hardened to a predetermined depth with respect to the rest of the arbor to harden the pivot or pivots (3). The invention concerns the field of timepiece movements.

A non-magnetic watch component (1) comprising a substrate (4) made of a copper alloy, wherein at least one part of the substrate (4) has a surface layer (5) including CuxTi.sub.y intermetallics, and a method for manufacturing this watch component.

A micromechanical component for a timepiece movement including a metal body formed using a single material. The single material is of high-interstitial austenitic steel type including at least one non-metal as the interstitial atom in a proportion between 0.15% and 1.2% with respect to total mass of the material.

The invention relates to a pivot arbor (1) for a timepiece movement comprising at least one pivot (3) made of a first non-magnetic metal material (4) at one of the ends thereof in order to limit the sensitivity thereof to magnetic fields. At least the outer surface of said pivot (3) is coated with a layer (5) of a second material selected from the group comprising Ni and NiP, and preferably chemical NiP. The invention concerns the field of timepiece movements.

A flexible horological component for an oscillator mechanism of a horological movement, the component extending along a principal plane (P) and including at least a part made of a composite material (1), the composite material (1) including a matrix (2) and a multitude of nanotubes or nanowires (3) distributed in the matrix (2), the nanotubes or nanowires (3) being juxtaposed and disposed substantially parallel with an axis (A) substantially perpendicular to the plane (P) of the component, the matrix including a flexible filling material (4) to fill the interstices between the nanotubes or nanowires (3), the filling material (4) comprising at least in part a thermal compensation material wherein the thermoelastic coefficient (TEC) is of the opposite sign to that of the other materials of the composite material (1).

An electronic device for a wristwatch including an electronic module provided with at least one sensor capable of measuring physiological data of a wearer of the wristwatch, and with an electronic control unit associated with the sensor. The electronic device includes a trim element acting as a case back and capable of being removably mounted on a case of the wristwatch, the electronic module being integrally housed within the trim element acting as case back. In one aspect, a wristwatch includes a case having a removable case back and a horological movement housed within the case, with the removable case back constituting the electronic device.