Magnetic interlocking closure device made of two main components different one another and frontally-interpenetrating, one “male” and the other “female”, in which shapes with complex outlines, such as those of a logo or of the customizable initials of a name, give shape to the “male” and, by subtraction, to the “female”, which allows to reversibly hold together two overlapping openable surfaces of materials such as fabric, leather, leather-imitation, cardboard, wood, other materials such as metallic, organic, minerals, ceramics, glass, composites, or a combination of them, which, by way of example, but not as a limitation, may be those of bags, handbags or of other containers such as purses, boxes, sheaths, cases, protective cases, or of pieces of apparel such as jackets, coats, raincoats, trousers, skirts, belts, necklaces, bracelets.