The words quadruple, triple, double, EPNS, and EPWM indicate that the ware is silver plated. If a piece is not American, refer to the sources abut English or Continental silver.
If it seems to be American, this dictionary will help.
You can trace its history through the use of the company's hallmarks on sterling silver.
Its long history goes back to a small silversmith's shop in Providence, Rhode Island, in the early 1800s.
Silversmiths in Baltimore, Maryland, had a maker-date system from 1814 to 1830.
An assay office was legally established in 1814, and marks were placed on all silver sold.
This is usually his first initial and last name, or just the last name.