Arthur Price of England Sovereign Silver Plate. The very best and most luxurious silver plate cutlery on the market, with a silver thickness of up to 40 microns. Unconditionally guaranteed for life and will offer a richness of patination, in time, that is beyond compare. Dishwasher Safe. The Dubarry design originated during the early 19th century. Inspired by the fashions of the period this pattern is the epitome of sleek delicacy.