Were these lids made separately from the vessels?

Silversmiths frequently manufactured covers as integrated parts of new tankards, pots, or tureens. The hinge and thumbpiece were custom-fitted to the specific rim during initial production. Some replacement covers exist due to loss or damage over the centuries. Examining the hinge pin and hallmarks helps determine if the top is original to the base.

What is the difference between solid silver and plate?

Solid sterling silver pieces contain uniform precious metal throughout their entire structure and bear standard town and maker hallmarks. These items hold intrinsic metal value alongside their antique worth. Old Sheffield plate utilises a fused sheet of silver over copper, visible as a subtle warm copper tone where the outer layer wears thin. This method offered a sturdier, more affordable option for large serving vessels.

How should I display lidded vessels safely?

Keep lidded items in stable indoor environments away from direct sunlight and high humidity. Sudden temperature shifts can stress glued collars or crack older ceramic bodies. Support the base rather than the lid or thumbpiece when moving pieces. Ensure display shelves sit level to prevent tall tankards or urns from tipping.