The invention relates to a clasp (1) for a watchstrap or bracelet comprising a central blade (2) and two movable blades (12), each movable blade (12) being hinged at one longitudinal end of the central blade (2), characterised in that each movable blade (12) has two side arms (13) intended for being received outside the side surfaces of the central blade (2) in closed configuration, these two side arms (13) comprising a first free end connected by a first pin (10) to a longitudinal end of the central blade (2), and a second end capable of receiving a second pin (30) for connection with a strand (40) of the watchstrap or bracelet, the central blade (2) comprising a hollow portion (4) in the central upper surface thereof for receiving such a second pin (30) arranged at the second end of the side arms (13) in the closed configuration of the clasp (1).

A buckle includes a folding member, a buckle cover pivotably linked to the folding member, a slide plate supported slidably relative to the buckle cover in the longitudinal direction of the band, and a swing arm rotatably supported by the buckle cover. The slide plate has a plurality of groove sections provided along the longitudinal direction. The swing arm includes a base, an arm section, an engagement click, and an operation strip, and is supported rotatably in a first rotational direction in which the engagement click engages with any of the groove sections and in a second rotational direction in which the engagement click separates from the groove section. The folding member includes a protruding section that comes into contact with the operation strip to rotate the swing arm in the second rotational direction when the folding member is rotated relative to the buckle cover.

A buckle includes a folding member, a buckle cover pivotably linked to the folding member, a slide plate supported slidably relative to the buckle cover in the longitudinal direction of the band, and a swing arm rotatably supported by the buckle cover. The slide plate has a plurality of groove sections provided along the longitudinal direction. The swing arm includes a base, an arm section, an engagement click, and an operation strip, and is supported rotatably in a first rotational direction in which the engagement click engages with any of the groove sections and in a second rotational direction in which the engagement click separates from the groove section. The folding member includes a protruding section that comes into contact with the operation strip to rotate the swing arm in the second rotational direction when the folding member is rotated relative to the buckle cover.

An adjustment device (100; 100′; 100″) for adjusting the length of a bracelet, having at least one adjustment assembly (10; 10′; 10″) movable relative to a clasp cover (7; 7′; 7″), the adjustment assembly and the cover being respectively provided with a first and a second fixing element (11, 71; 11′, 71′; 11″, 71″) for their respective fixing according to several positions capable of inducing different bracelet lengths, and also being provided respectively with a first and a second indexing element (21, 72; 21′, 72′; 21″, 72″) for their temporary respective positioning according to one of the several positions, the adjustment assembly (10; 10′; 10″) also comprising a guiding device including a first guiding element (3, 4, 5; 3′, 4′, 5′; 3″, 4″) cooperating with a second guiding element (74; 74′; 74″) of the cover (7; 7′; 7″) to guide the displacement of the adjusting assembly (10; 10′; 10″) relative to the cover (7; 7′; 7″), the first indexing element (21; 21′; 21″) being independent of and/or distinct from the first guiding element (3, 4, 5; 3′, 4′, 5′; 3″, 4″) and/or the second indexing element (72; 72′; 72″) being independent of and/or distinct from the second guiding element (74; 74′; 74″).

A band includes a clasp, wherein the clasp includes a cover member and an adjustment portion, the adjustment portion includes a pair of rail portions that are arranged along inner sides of two side walls of the cover member in a longitudinal direction of the cover member and have a plurality of grooves for length adjustment, a pressing portion that is disposed at an inner bottom surface of the cover member and includes an elastic member, and an engagement pin that is inserted through the one end of a adjustment piece and is configured to be engaged with the grooves of the rail portions, and the pressing portion is configured to press the engagement pin against the rail portions in a state where the engagement pin is engaged with the pair of grooves.

A device for finely adjusting the length of a bracelet inserted between two elements of the bracelet and includes an outer part attached to one, an inner part attached to the other and to slide in the outer part parallel to the longitudinal direction of the bracelet, causing the length of the bracelet to be varied, and a stop arranged to limit the travel of the inner part relative to the outer part so the bracelet cannot be extended beyond a maximum length. The outer part includes a wall having an immobilization hole on its inner side. The inner part includes a pivoting lever with a first end biased by a spring toward the outer part wall, permitting the first end to engage the immobilization hole, immobilizing the inner part relative to the outer part. The inner part has a control member permitting manual control of the lever.

A metallic watch strap, including a first metallic strap half and a second metallic strap half. The first metallic strap half extending along a longitudinal direction and having an upper side and a lower side. The second metallic strap half having a folding clasp with a first fastening structure equipped to be fastened to the first strap half and with a second fastening structure equipped to be fastened to the second strap half. The first fastening structure has a slide, which, in a first state, is displaceable relative to the first strap half in a guided manner, and including a fixation element, which, in a second state, abuts on the first strap half. The first strap half has fixation indentations and the fixation element has at least one fixation projection fitting into the fixation indentations. In the second state, the fixation projection engages into one of the fixation indentations.

A metallic watch strap, including a first metallic strap half and a second metallic strap half. The first metallic strap half extending along a longitudinal direction and having an upper side and a lower side. The second metallic strap half having a folding clasp with a first fastening structure equipped to be fastened to the first strap half and with a second fastening structure equipped to be fastened to the second strap half. The first fastening structure has a slide, which, in a first state, is displaceable relative to the first strap half in a guided manner, and including a fixation element, which, in a second state, abuts on the first strap half. The first strap half has fixation indentations and the fixation element has at least one fixation projection fitting into the fixation indentations. In the second state, the fixation projection engages into one of the fixation indentations.

A customizable necklace comprising a necklace body, a first fastener and a second fastener. The necklace body forms a closed loop. The first fastener is configured to disconnectably and selectively secure to different positions along the necklace body. Similarly, the second fastener is configured to disconnectably and selectively secure to different positions along the necklace body. The customizable necklace system is configured to adopt multiple usage positions, in which the first and second fasteners are attached to the necklace body and to one another forming a first loop and a second loop, wherein the first loop has a different size in each usage position and the second loop has a different size in each usage position.

The method for determining at least one morphological data item of a wriststrap wearer in order to prepare (E3) a wristwatch strap taking into account this item includes: acquiring (E1) at least one morphological data item (1; 2) of the wriststrap wearer from an acquisition device of a determination system (11) provided with at least one sensor, such as a camera, a laser or a lens, configured to scan, photograph, or film at least a portion of the wrist and/or hand of the wearer, wherein the determination system (11) is designed to receive and optionally emit waves to acquire at least one morphological characteristic of the wearer of the bracelet in a first operation (O11), the at least one morphological data item being a dimension (1) from among a circumference and/or height and/or width of a wrist portion (p1) and/or of a portion of the hand (p2) of the wearer.