tzu-chou vases

[hellinas]

Hello there,
can anyone tell me what are those vases?
Im a Greek collector of chinese porcelain, Ive spent more than a week trying to notify those items'
it is tzu-chou technic but I did not find any familiar to them. I wish to know if the stamps on the neck of the vases are only decorative or there's a name.  If you need any information about greek art old and new pls ask me. Im an expert historian

Thank you