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 Grecian design was first produced during the Art Deco period, its bevelled edges and angular corners reinterpret the geometry of classical Greek architecture.