FASTENING DEVICE FOR NECKLACES

The fastener made of metal is used for connecting the ends of a jewellery chain having at least one ball- or pearl-shaped end member which is connected to the chain via an intermediate member with a small diameter. The fastener has a pair (2) of rings with two parallel rings (4, 6) which are rigidly connected to one another via at least one spacer (8, 10) in such a way that they are located spaced apart and parallel to each other. In the plan view of the ring plane, the two rings (4, 6) are of essentially congruent construction. One of the rings (4) is provided with a slot (12) transversely to its profile in a region adjacent to the spacer, for insertion of the intermediate member at the end of the chain (18) into the space between the two rings. A connection element which is fixedly connected at least to the spacer is provided in the region of said spacer.