Each product has been marked at the bottom or at the back with a trade mark. You can findthe different Royal Delft trade marks here.
Since 1879, each hand painted article produced by Royal Delft has been marked with a letter code. Using the list year codes you can find out yourself in which year your Delftware was produced. Each product which carries our trademark is provided with a certificate of authenticity.
On the left below the mark are the initials of the painter. This list gives as comprehensive an account as possible of painters and designers from the year 1876 onwards and the initials they used to sign their work. The duration of their term of employment is given.