Hi again Marco. Thanks for the picture of the mark - I would say that not only is it similar, it's the same mark, except for the addition of the makers' names. Is the pattern itself identical to the pattern you have? A person can't be 100% sure because potters did copy both patterns and marks, but if the pattern is the same I would attribute your set to Pratt as well, pending any further enlightenment. The time period they were active is about right too, from the 1830s on.