Home Museum collection Year codes & trade marks

Year codes & trade marks

Since 1879, each hand-painted article produced by De Koninklijke Porceleyne Fles has been marked with the mark on the right. It consists of:

  • A beaker / apothecary bottle
  • The initials JT, from Joost Thooft (company owner in 1876)
  • The word ‘Delft’

To the left of the brand are the painter’s initials, to the right two letters indicating the year code. The year codes can be found on this list. And here you will find the other markings that have been used over the years. Are you looking for the painter of your object? Since 1876, the painters’ initials have also been kept. You can consult this overview for this.

The hand painted trade mark