Here is a Beautiful Rare Antique John Mortlock Oxford Street London 10 1/2" Plate. In my opinion, it is in Mint condition for it age. I would say this is about 150-200 years old. Marked on the back1746 John Mortlock Oxford & London W. Registered trade mark, Parisienne and also there is a blue arrow. Very Rare to find, especially in this condition.