Theft-deterrent device

A device for discouraging theft on an article displayed for sale, which article is made of cloth, skin, leather or like materials, comprising means for attaching the device externally to said article, locking means for locking the device in said attached state in a manner preventing unauthorized disattachment of the device from the article, at least one closed space located within the device, a substance held in said closed space, said substance having the properties of adhering permanently to the material of said article, when brought in contact therewith, and rendering the article unfit for its intended use, and said closed space having at least one confining wall designed to be easily breakable when the device is subjected to undue external forces as a result of an attempt of unauthorized disattachment of the device from said article, whereby said substance is released to spread onto said article and to render it unfit for its intended use, comprising a first member and a second member having mutually facing surfaces and being movable relative each other between an open position and a closed position, a part of said article being inserted and captured between said mutually facing surfaces in said closed position, said fastening means including metal pins fixedly mounted in said first member projecting outwardly from said surface of said first member towards said surface of said second member and corresponding recesses in said surface of said second member for receiving said metal pins when said first and second members are in said closed positions, and said locking means including mutually co-acting locking elements located in said first and second members, respectively, and separated from said pins for locking said first and second members in said closed position.