This is a Nice Hexagonal Shaped Footed Storage Jar with Blue on White Orientalist Style Floral Masons Ironstone Pattern. It may have been a Tea Caddy, Biscuit Jar, or for Ginger, Jams, etc. It retains a Fancy Gold and Black Label on the underside from Fortnum & Mason and I have shown a little of the writing beneath the Label. It appears to be Circa 1950's-1970's.
It measures about 6 1/2" high x 3 5/8" across and is in Very Nice Vintage Condition.
Blue Floral Mason Ironstone Tea Food Storage Jar