1) hand painted mark from 1935 to 1940, the letter "E" was because with this the goods was approved for expornting, the "X" was a mark wanted by a customer.

2) hand painted mark on the pieces painted by Prof. E. Cacciaguerra from the 1948 to the 1949

3) hand painted mark from the 1948 to the 1962, for the goods produced in exclusive for Ardalt of New York, the number was a refer code of the customer

4) hand painted mark on the pieces painted by Archimede Primon called "Mede" from the 1960 to the 1980

5) mark print by stamp from the 1960 to the 1980

6) mark print by stamp from the 1960 to the 1980

7) hand painted mark from the 1960 to the 1990

8) hand painted mark from the 1965 to the 1985

9) hand painted mark from the 1965 to the 1985

10) mark print by stamp from the 1970 to the 1990

11) mark print by stamp from the 1970 to the 1990

12) mark print by stamp with hand painted numbers, from the 1975 to the 1992, these mark was for limited editions

13) decalco mark produced in exclusive for Tiffany from the 1980 to the 1995.