A Mason's ironstone desert dish.
The shell shaped body decorated with the 'Japan" pattern.
Impressed one line factory mark : 'Mason's patent ironstone china'
24.5cm by 21cm
English Circa 1813-1820
Reference: Godden's guide to Mason's China and the ironstone wares by Geoffery Godden F.R.S.A. Page 142, plate 194

