A watch strap includes a substantially inflexible main portion, a flexible auxiliary portion coupled to the substantially inflexible main portion, and a tightener coupled to the flexible auxiliary portion. When in use, the tightener is configured to maintain a selected tightness, and the flexible auxiliary portion is configured to be elastic.

Watch comprising at least one case and a strap formed by a flexible blade with a first end fixed to the case and a second opposite end provided to cooperate with a device for attaching and adjusting the length of the strap. According to the invention, the adjustment device comprises a clasp formed by a cap and a lever between which the flexible blade slides, the clasp being hinged on the case by linking means which define an axis of rotation about which the lever can undergo a rotation in order to be able to move into an open position and into a closed position, the lever comprising an eccentric which is integral with the lever in the vicinity of the axis of rotation and is provided in order to clamp the free end of the blade against the cap and to retain the strap when the lever is in the closed position.

Watch or item of jewellery comprising a case or setting comprising main and secondary slots that enable the fixture of interchangeable removable wristbands comprising an end link with an end piece with studs arranged to cooperate in a complementary manner with these secondary slots, wherein this link comprises a lock with a slide catch arranged to cooperate in a complementary manner and with minimal play with the main slot in a locking position, towards which the slide catch is moved by elastic restoring means, wherein said lock comprises intrinsic unlocking means with a pushbutton operable by a user to move this slide catch away from the main slot and control an unlocking of the lock by retraction of the slide catch by an application of pressure to the pushbutton.

Modular smartband can include a plurality of coupled modules. The plurality of modules can include at least one core module having at least one processor and at least one peripheral module. Each of the plurality of modules has a coupler end and a receiving end disposed on opposing ends of the module, the coupler end configured to be received in the receiving end of an adjacent module. At least one of the plurality of modules can include a display and at least one the plurality of modules includes a battery.

The present disclosure discloses a watch with a case convenient to replace. The watch includes a case, a movement and an inner container, wherein the movement is disposed on the inner container. The watch further includes an engagement structure for assembling the case and the inner container; when the case is dismounted, the engagement structure is pressed to be elastically compressed towards one side of the inner container so as to be disengaged from the case; and when the case is mounted, an outer side of the inner container is sleeved by the case, and the case is pressed along a side wall of the engagement structure, so that the engagement structure is engaged with the case. The watch is convenient to operate, so that a user can select the proper case and inner container to be matched and combined, and waste caused by purchasing various different watches is avoided.

The present disclosure discloses a watch with a case convenient to replace. The watch includes a case, a movement and an inner container, wherein the movement is disposed on the inner container. The watch further includes an engagement structure for assembling the case and the inner container; when the case is dismounted, the engagement structure is pressed to be elastically compressed towards one side of the inner container so as to be disengaged from the case; and when the case is mounted, an outer side of the inner container is sleeved by the case, and the case is pressed along a side wall of the engagement structure, so that the engagement structure is engaged with the case. The watch is convenient to operate, so that a user can select the proper case and inner container to be matched and combined, and waste caused by purchasing various different watches is avoided.

Provided is a timepiece band that improves durability, water resistance, and fit. The timepiece band includes a first band, which is a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%, and a second band, which is also a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%.

Provided is a timepiece band that improves durability, water resistance, and fit. The timepiece band includes a first band, which is a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%, and a second band, which is also a single part, configured from metallic glass with an elastic modulus greater than or equal to 30 GPa and less than or equal to 70 GPa, and an elastic limit greater than or equal to 2% and less than or equal to 20%.

A watch strap includes a substantially inflexible main portion, a flexible auxiliary portion coupled to the substantially inflexible main portion, and a tightener coupled to the flexible auxiliary portion. When in use, the tightener is configured to maintain a selected tightness, and the flexible auxiliary portion is configured to be elastic.

Attachment systems for attaching a wearable electronic device to a user including a sizing band and a retaining band are disclosed. The sizing band includes at least one sizing eyelet and a band-insertable end. The retaining band includes at least a post for insertion into the sizing eyelet of the sizing band and a concealment aperture configured to receive the band-insertable end of the sizing band. On a bottom surface of the retaining band can be a recessed guide bed configured to guide the band-insertable end along the bottom surface of the retaining band. A wearable electronic device can couple to both the sizing band and the retaining band by accepting an end portion of each band into receiving channels extending into opposite sidewalls of the housing.