Jasba almost always used white clay. There is a range of distinct marks help to identify many Jasba items. Marks are a mixture of incised and embossed.
The easiest to identify include the Jasba name on the base. This is also sometimes included within a raised square (note sometimes the raised square just states West Germany, which is also distinctive of Jasba items).
Jasba vases were marked with a range of different labels, ranging from wax moulded labels through to metal foil and paper stickers.