I bought matching 2 vase set in 1965 and have used them for cut flowers. One had a home repair job done when a toddler snapped the base on one. (still functional and could be professional repaired easily) They are a little under a foot tall, but I have not measured them. At 76, I’m a little slow on mastering new projects, but I will try to post snap shot. I found the same crown & shield on this site. There is a gold number 1855 with the shield mark.
I turned the back out on one and photographed them together.
I do not see a reference for the mark but it can be viewed on: https://kovels.com/marks/pottery-porcelain-marks/crown-shield.html?eid=9905
This is the best I can do for now on photo as I am ill at present. [img size=334]https://kovels.com/media/kunena/attachments/legacy/images/Flash_picture_of_Vases.jpg[/img]