Abstract: A coin-deposit lock to be placed on a trolley being part of a row of mutually connected e.g. shopping trolleys or baggage trolleys comprises a main slide being longitudinally slidable against the force from a spring and a measuring slide likewise longitudinally slidable against the force from a second spring. Each of the slides has a transverse central aperture, and when a coin of a certain value (diameter) has been inserted between the slides, the apertures are mutually aligned. Upon insertion of a key belonging to the lock in a first key opening in the lock, the slides can be moved to a position in which a latching finger on a pivotable release member engages in the mutually aligned apertures and retains the slides and the coin between them in a withdrawn position. At the same time, the release member pivots to a position, in which a second latching finger on it frees a second key associated with a previous trolley in the row thus freeing the trolley from the row.