From the seventeenth century onwards, there was scarcely a household in Britain that did not possess some items of pewter: plates, bowls, tankards, spoons, candlesticks were just some of the everyday items made from pewter. Pewter tankards were used in public houses from the 17th century through to the 20th century. Beer tankards were very similar in shape throughout.

Pewter warming dish. This would have been filled with hot water and used on a dining table to keep food warm.
 
Couple of slight dinges to the edge.
 
Mearuring: 24cm diameter.