Belleek Medium Octagonal Jardiner - 4th mark

I have no idea why this is called "octagonal" since it only has 6 sides unless you count the top and bottom.

I believe this to be the medium size.

This was produced between 1946 - 1955. It is 4-3/8" tall and between 4-1/4" and 5-3/4" wide across the top.