It is a type of pottery that is decorated by tissue transfer printed from copper engravings (a process invented in 1750). This is a very skillfull craft as nowadays most potteries use the easier process of water slide transfer (similar to those that children put on model planes). Burleigh is the only company in the world producing tranfer printware.
The borders are printed from the engraving and come out as a continuous ribbon. Because they are applied to a variety of shapes by hand they do have a point where the pattern is interrupted where the ends meet.