Abstract: The invention relates to a counter (10) for presenting and/or selling goods. The aim of the invention is to provide a means of displacing a module consisting of a system of joint mechanisms (22) which are associated with a glass pane (21) by means of fixing elements (23) between a closed position (20) in which the inside of the counter (13) is covered and an open position (20′) in which it is exposed. Said joint mechanisms (22) are mounted on the supports (15) of the counter (10) in such a way that they can pivot about a horizontal pin (18). In order to ensure that the modular unit is secure in the open position (20′) the joint mechanism (22) is provided with an extended arm (24) which has the swivel bearing (18) on its lower arm section. During the transition from the closed position (20) to the open position (20′), the center of gravity (27) of the module in relation to the swivel pin (18) moves to the opposite side (27′).