For me there is therefore no way of telling the age of these jars other than by comparison with better documented Chinese porcelain, and it is only by the decoration - dragons , borders, general shape etc. The fact that the jar contained bones when found should possibly indicate the later part of the possibly period i.e. 17th to 18th century. Please note that my dating is very conservative. Please excuse my indecisivness on this. This information is given as an example of private conversation only and is not intended to be used as a promotion of any individual piece.
All opinions is the authors and is given as such with all hazards of judgeing anything from a photo.