Abstract: This display case includes a base on which may be arranged a tray of elastic material sufficiently rigid to define, by means of ribs, cells for the storage of the articles to be displayed. When the tray is within the base and the ribs upwardly disposed the display case is set up for transporting the articles. Following inverting of the tray, display elements provided with fastening means in the form of the tongue may be fastened to the tray by insertion of the tongue into a slot which each rib defines on the opposite surface of the tray. Under these conditions the display case is set up for showing the articles. The tray display elements which are readily moved may be stored in a compartment forseen to this purpose. According to a variant the tray may be independent and provided with stiffening elements associated with at least two opposed edges thereof.

Abstract: A U-shaped part (1) of which the two parallel branches (1a, 1b) may slide in corresponding grooves (9a, 9b) of a casing, forms a key receiver ring. In a chamber (13) of the casing (2) there is provided a mechanism comprising an oscillating part (3) provided with a spring blade (11) and having a series of notches (14) forming latch locks. The free end of the longer branch (1b) of the U-shaped part (11) is provided with a bolt (4). A maneuver button (10) allows to oscillate the oscillating part (3) against the action of its spring (11) to disengage the bolt (4) of the latch lock (14) where the spring was keeping it engaged, thereby allowing to disengage from the casing (2) the shorter branch (1a) of the U and to bring the bolt (4) selectively facing one of the latch locks (14) so that the length of the portion of the ring (1) being outside the casing corresponds to the number of the keys engaged on that portion.