Abstract: A safe having an armor plated housing and a armor plated door is provided with an automatic locking system for the door. Within the door an electric gear motor is disposed operating when energized the locking system. The electric motor is controlled by a timer switch which in turn is adjusted by a program control of a data storage system such that the door can be opened only during the service hours of the user.The safe is provided with an inner door and in the chamber between the outer door and the inner door a key depot is arranged receiving at least keys for the inner door. The key depot has mechanical and electrical detecting devices checking the inserted keys.