Abstract: The internal space of a safe is subdivided into two compartments lying side by side by a vertical partition provided with a reinforced vertical upright. A reinforced closure door comprises two leaves adapted to be closed in succession, each having its own locking mechanism with bolts adapted to engage in said upright in their thrown position. The bolts of the two mechanisms are made functionally interdependent by means of pivotal latch members borne by the partition which lock in the thrown position the bolts of the second-to-close door leaf in response to the throwing of the bolts of the first-to-close door leaf.