Abstract: A bracelet clasp including a first rigid strip of which a first end is hinged on a first end of a second folding strip configured to receive a first strand of the bracelet at the second end thereof, and of which the second end of the first strip is hinged on a first end of a third folding strip from which first and second arms extend, and a cap hinged at one of the strips. The clasp is provided with first and second push-pieces. The clasp includes a banking which is housed between the first and second arms of the third strip in the closed position of the clasp, so as to ensure a symmetrical opening of the arms when simultaneous pressures are exerted on the push-pieces.

Abstract: Clasp for a piece of jewellery or wristwatch, including a stretcher like structure with a first housing in which a first push-piece and a second push-piece are moveable on a first bearing surface against an elastic return means, and held by at least one closure plate able to occupy a closure position in a second housing. The clasp includes at least one resilient locking element for this closure plate, including a push-button, held in this stretcher like structure and arranged, in a compressed position, to permit the motion of the closure plate and, in a relaxed position, to immobilise this closure plate in the closure position via the cooperation of this push-button with a fourth housing comprised in the closure plate.