On the Board's 'Glass Gallery' we already have this pattern showing on a comport in the Registered Designs section (06) - pp. 3 and 4 - would imagine posted by Fred - to which I think he's added some comment along the lines of 'not very common'. Anyway this sugar can be added to the rogues gallery if of interest.
Four mould seams, and a lozenge that's certainly not very legible so possible this example wasn't pressed very close the date of Registration. Some sizeable white stones in the glass and a fair amount of wear to the underside of the foot, otherwise in good condition. 5.25" (135 mm) across the rim.