The metal casting collection does not specialize precisely in specific materials, casting processes or types of foundry castings. The only connecting link between the various items is foundering technology used in their manufacture. The inclusion of metal casting within the TBM collections is significant since the use of metal and development of metal casting produced substantial impact upon the evolution and result of human history. Metal was responsible for progression from the Stone Age, is an inherent accompaniment through the developmental stages of the whole of humankind, from the period of bronze to iron ages to the current period of "plastic-glass".