Made in Italy.The lesson about Italian jewelry.
According to the Italian law and on special request of The Guardia di Finanza of Italy (Italian law enforcement agency), all jewelry made in Italy MUST have a Stamp with Factory Number.
For example, if the chain has a stamp - 21AR
#21 means it is factory number, AR - means city Arezzo. If factory located in Vicenza - VI, Milan - MI, Naples - NA, Rome - RO, etc.
If gold or silver items made in Italy, the only one proof is the factory stamp with factory number and city where the factory located.