A watch body and a strap are included. The watch body includes a case body having a cylindrical shape, a movement disposed inside the case body, a cover member covering one opening of the case body, and a case back covering the other opening of the case body and including a transmissive region through which the movement can be visually recognized from the outside and the movement can be visually recognized through the cover member. The strap is attached to the watch body and includes a base facing the case back of the watch body and a strap body coupled to the base. The base includes a decoration at a position overlapping at least a part of the transmissive region, and the decoration can be visually recognized through the cover member.

The timepiece includes a tourbillon including a carriage that bears a sprung balance and a magnetic escapement device, the latter including an escape wheel set, formed of an annular magnetic structure, and a magnetic element coupled with the magnetic structure and having an oscillating movement that is synchronous with the oscillation of the mechanical resonator. The mechanical escapement is arranged so as to have alternately energy accumulation phases, from a conversion of mechanical energy supplied by the barrel into magnetic potential energy in the magnetic escapement, and transfer phases of energy accumulated in the magnetic escapement to the magnetic resonator. During the energy transfer phases, the magnetic element is subjected to a magnetic force such that the magnetic escapement then converts into mechanical energy magnetic potential energy accumulated in the preceding energy accumulation phase to be able to maintain the oscillation of the mechanical resonator.

The timepiece includes a tourbillon including a carriage that bears a sprung balance and a magnetic escapement device, the latter including an escape wheel set, formed of an annular magnetic structure, and a magnetic element coupled with the magnetic structure and having an oscillating movement that is synchronous with the oscillation of the mechanical resonator. The mechanical escapement is arranged so as to have alternately energy accumulation phases, from a conversion of mechanical energy supplied by the barrel into magnetic potential energy in the magnetic escapement, and transfer phases of energy accumulated in the magnetic escapement to the magnetic resonator. During the energy transfer phases, the magnetic element is subjected to a magnetic force such that the magnetic escapement then converts into mechanical energy magnetic potential energy accumulated in the preceding energy accumulation phase to be able to maintain the oscillation of the mechanical resonator.

A self-winding mechanical horological movement including a pivotally oscillating weight, wherein the oscillating weight is provided with a decorative disc mounted on the oscillating weight and pivotally driven by the weight. The disc is fastened to a support that includes a stem inserted into a hole provided in the rotational shaft of the weight. The stem and the hole include non-circular section cylindrical portions corresponding with one another, so that the support and the disc are pivotally driven by the shaft. The disc forms a decoration that covers the entire surface of the movement, without requiring technical complexities. The disc can be free to undergo an axial movement in relation to the weight, so that the disc may be removed from the weight when the horological movement is dismantled from a watch case.

A timepiece component includes a base material including silicon as a main component, and a light reflecting layer formed on the base material and including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer stacked in this order, when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region, and at least one of the thicknesses of the first silicon oxide layer in the first region and the second region and the thicknesses of the second silicon oxide layer in the first region and the second region is set such that the thicknesses are different from each other.

A timepiece component includes a base material including silicon as a main component, and a light reflecting layer formed on the base material and including a first silicon oxide layer, a silicon layer, and a second silicon oxide layer stacked in this order, when the light reflecting layer is viewed in plan view, the light reflecting layer includes a first region and a second region, and at least one of the thicknesses of the first silicon oxide layer in the first region and the second region and the thicknesses of the second silicon oxide layer in the first region and the second region is set such that the thicknesses are different from each other.

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 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.

The present invention provides a watch including a movement, a case housing the movement and an adjustable dial above the movement. The adjustable dial shows different patterns by adjustments. The adjustable dial includes an upper dial and a lower dial. The appearance of the watch can be adjusted due to different preferences and different occasions. By combining with the recognition technology, the watch of the present invention can be used as an encoder in a security system.

A display mechanism for a watch and a watch including the display mechanism, which includes a display for displaying information, a first and second mobile elements and a support, so that when the first mobile element moves with a first primary speed, the second mobile element moves into a first position so as to cover the display and when the first mobile element moves with a first secondary speed, the second mobile element moves into a second position so as to expose the display. Thus, the display can be exposed which allows to maximize the display surface when information is present on the display.