PTCI571 - Important pair of iron armored doors, equipped with an original central locking system branded “Brevetti S.I.S.T.I. – Milano”, a testimony of specialized Italian production.
The doors feature a horizontal sheet metal structure, reinforced by robust diagonal crossbars that converge in the central multiple handwheel mechanism. The patented system activates a vertical tie rod lock with upper and lower anchoring points, guaranteeing an airtight and secure closure, typical of technical or protected environments.
The cast mark on the lock body identifies the Milanese production S.I.S.T.I., a company active in the technical and industrial closure sector in the first half of the twentieth century.
One of the doors is equipped with protected upper ventilation slots, a functional element typical of technical rooms, bunkers, strong rooms or air-controlled industrial environments.
20th century.
Dimensions cm W 81 x H 182
