An fine and large early-19th century Mason’s patent ironstone Platter produced by Mason's Ironstone, England and dating to their earliest period, circa 1815 to 1820's .
It is beautifully hand decorated in a striking chinoiserie pattern called "Coloured Wall" Pattern, and much hand painted in burnt orange / red and blue colourway. The pattern would have been transfer printed then boldly hand enameled with much hand painted gold gilded details 
This pattern is illustrated in Mason's Ironstone pattern book published by the Mason's Collectors Club., page 94.
The base carries Mason's Single line impressed mark "Masons Patent Ironstone China", firmly dating this piece to circa 1818.
Ironstone china, ironstone ware or most commonly just ironstone, is a type of vitreous pottery first made in the United Kingdom in the early 19th century. It is often classed as earthenware although in appearance and properties it is similar to fine stoneware. It was developed in the 19th century by potters in Staffordshire, England, as a cheaper, mass-produced alternative for porcelain.
There is no iron in ironstone; its name is derived from its notable strength and durability.
Ironstone in Britain's Staffordshire potteries was closely associated with the company founded by Charles James Mason following his patent of 1813, with the name subsequently becoming generic.The strength of Mason's ironstone body enabled the company to produce ornamental objects of considerable size including vestibule vases 1.5 metres high and mantelpieces assembled from several large sections.
Antique ironstone wares are collectable, and in particular items made by Mason's.