In 1979, the Museum of Primeval and Early history in Schönwalde (Potsdam District) investigated a casket tomb burial ground of the pre-Roman Iron Age (200 BC). The iron and bronze jewelry recovered from one of the caskets was in a state of advanced corrosion and preserved only in fragments. Prior to their treatment, these fragments were stored at a temperature of minus 25°C. This was followed by the passivation of the corrosive compounds on the iron objects by drying out in a warming cupboard at a temperature of 250°C over a period of 40 hours. After this treatment the objects were saturated in a vacuum with poly(methacrylate). The jewelry parts consolidated in this manner could subsequently be treated mechanically. Finally they were coated with the protective wax (wax-fluid S). The bronze parts were first treated mechanically and then with ammonia vapor and distilled water. The drying out of the objects was followed by the vacuum saturation with an alcoholic 3 per cent benzotriazol solution. Finally the bronze parts were saturated in a vacuum with benzotriazole diluted methacrylicvarnish. This was followed by a reconstruction, by which concrete statements could be deduced on the details of production technology, materials used, tools, the specialization of fine smiths of the Iron Age, and on the ways in which this jewelry was worn.