What markings other than sterling indicate that a piece of tableware is silver?

925: This mark indicates that the item is made of sterling silver, which is an alloy of 92.5% silver and 7.5% other metals, typically copper.

800: This mark indicates that the item is made of 80% silver and 20% other metals, typically copper.

900: This mark indicates that the item is made of 90% silver and 10% other metals, typically copper.

Britannia: This mark is used on British silver items that meet the standards set by the Britannia Silver Association. Britannia silver is an alloy of 95.8% silver and 4.2% other metals, typically copper.

Coin: This mark is used on British silver items that are made from melted British coins. Coin silver is an alloy of 92.5% silver and 7.5% other metals, typically copper.

EPNS: This mark indicates that the item is electroplated with nickel silver, which is an alloy of copper, nickel, and zinc.

EPBM: This mark indicates that the item is electroplated with Britannia metal, which is an alloy of tin, antimony, and copper.

EPM: This mark indicates that the item is electroplated with pewter, which is an alloy of tin, lead, and copper.