A rare group of Chinese master moulds bearing dates of manufacture suggested from the Han Dynasty to the Warring States periods (475bc to 220ad). Bronze master moulds were used to form clay moulds into which molten bronze was poured. The group contains: A mould for crossbow arrowheads. Warring States style. A mould for spade money. Wang Mang Interregnum style. A mould for spade money. Warring States style. A mould for knife money. Warring States style. A mould for bronze coins (round with square holes). Warring States style. All have carbonacious materials in the corosion