Thanks SophieMarie !! That is one of my favorite sites for Chinese or Japanese items !! There is another that is quite good !! Will try to find the link,, its a bit more simplified than Gotheborg.com !! But with these things you can`t have too many references !!

Zigs,, please look at the stem cup on the link I gave !! Its made the same as yours with similar pattern !! The older patterns are not named You just have to go by the clay type and general look of the item !!
Would help if you took a pic of the bottom of the vase !! That helps determine age !!