The mark consists of the configuration of an endoscope comprised of an insertion tube with a circular loop with a knot at the top of the loop, an eyepiece and a light source, all attached to a cuboid shaped ocular housing, characterized by two identical opposite planar circular end surfaces, two planar parallel lozenge-shaped side surfaces, and two parallel identical planar side surfaces, said side surfaces being parallel to a line normal to said end surfaces, adjacent side surfaces lying in planes normal to one another, adjacent side surfaces being connected by convexly curved transition surfaces which intersect the planar end surfaces to form the boundary of the end surfaces as circles. The insertion tube, the ocular housing and the light source are gold and the eyepiece is black. The mark claimed is only the cuboid shaped ocular housing and the portion of the insertion tube comprising a circular loop with a knot at the top. The dotted lines show the position of the mark on the goods and are not a feature of this mark.