The design on this jug appears to have been one used on rare occasions throughout the middle of the sixteenth century. Examples first appear in the "potters" blue and white style of around 1535-40 (Atasoy, Nurhan, and Raby, Julian: Iznik, the Pottery of Ottoman Turkey, London, 1989, pl.176). While that example is also a jug, the design is found more frequently on contemporaneous dishes to the present jug (Atasoy and Raby, op. cit., pl.425 for example).
There is a small secondary motif scattered across this jug which resembles a cloudband. The same motif is found on a number of pieces of around this period (Atasoy and Raby, op.cit, pls.392 and 422). It is a motif which is found more frequently in blue decrating the exterior of dishes, particularly certain blue and white groups.
One interesting feature of this jug is that two different blacks have been used. The first, with a slight manganese tinge, is used only for the main divisions of different panels, while a finer, more intense colour is sued for the outlines of the motifs themselves.