1493 Marking stones for water, gas and cables HO.

Are signs made of stone as markings for underground road installations. The blue signs indicate underground valve bodies on water pipes with shut-off valves, the yellow signs indicate shut-off valves on the natural gas network, and the gray signs indicate underground post office cables. Several signs in a row indicate the course of underground lines and underground cables.

Contents: 18 each of blue, yellow and gray markers.