Silver or Silverplated?

These are stamped on the bottom of two tea/coffee pots

Both are electroplate marks. The first is by Wilcox Silver Plate Co of Meriden Ct and dates from after the company became part of the International Silver (IS) group.

The second is by Forbes Silver Co, also of Meriden and also part of the IS family. The word “Sheffield” is a generic term used by US companies to indicate electroplate.