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. Rattail is the oldest pattern in the range and dates from around 1710 when modern table etiquette started to develop.   Knives are not for sale to persons under the age of 18. - all knives and bladed products are delivered by Age Verified Delivery (AVD). The carrier may request proof of age in order to deliver your parcel. If proof of age is not available, or the recipient is underage, the carrier will refuse to deliver.