Gorgeous vase. I looked up the mark in 'Kovels' Dictonary of Marks' and it shows the mark you have on the bottom of your vase and states "S.Fielding & Co. , Stoke, Staffordshire, England - Earthenware, majolica. Printed ca. 1891-1913 (1879-1964+)
I googled the S.F. Fielding..... and apparently the new marks with the Crown Devon started in 1910
Thanks so much Carolyn!
I did a bit of Googling and it looks like my vase would be dated between 1913 and 1917 according to this site, since 1913+ most marks incorporate "DEVON" or "CROWN DEVON" in the marks and since 1917+ the initials "SF & Co" were dropped from the mark. http://www.thepotteries.org/mark/f/fielding.html