Nearly all surviving documents from Italy before the third century BC, when Rome began its conquest of the peninsula, are in Etruscan. The vast majority of these inscriptions are simply names on tombstones.53 The Bonfantes list only eight Etruscan documents of any length, half of which are written on metal.54 These four metal plates are also the oldest of the eight major surviving Etruscan documents; all of them are sacred texts.
4.1. The lead plate of Santa Marinella (500 BC), written on both sides, was a religious text.55
4.2. The Pyrgi plates (early 5C BC) have been discussed above (2.9). They represent not only one of the earliest lengthy Etruscan documents, but also sacred writing on gold plates in both Phoenician and Etruscan. Although not quite a "Rosetta Stone," these plates were important in the deciphering of Etruscan.
4.3. The lead tablet of Magliano (475—450 BC) (inscribed on both sides) is a religious text discussing rituals and sacrifices.56 Since both the Santa Marinella (4.1) and the Magliano lead plates were inscribed on both sides, it clearly indicates that they were not intended as dedicatory inscriptions to be mounted on walls but were to be handled while read.
4.4. The famous bronze haruspicina (liver divination) model Settima (3C—1C BC) is not precisely a metal plate but is nonetheless an example of sacred prophetic writing on bronze.
That the three oldest Etruscan texts of any length (4.1, 4.2, 4.3) are all sacred writing on metal is certainly indicative that the practice was widespread in pre-Roman Italy. The dual Phoenician/Etruscan inscription from Pyrgi (4.2, 2.9) indicates that the practice was most likely adopted from Phoenicia, where examples of writing sacred texts on metal plates date much earlier.
http://maxwellins***ute.byu.edu/publ...um=1&id=637#15