Quadruple plate refers to a type of silver-plated metalware where the base metal is coated with four times the amount of silver typically used in standard silver plating. This process was popular in the late 19th and early 20th centuries, offering a more durable and luxurious finish than single or double plate, making it a more affordable alternative to solid silver. Items were often marked with terms like "Quadruple Plate" or "4x" to denote this higher quality plating.
Union Metal Works was a manufacturer of silver-plated hollowware and flatware, operating primarily in the United States during the late 19th and early 20th centuries. They produced a range of household items, from serving spoons and forks to pitchers and trays, often featuring intricate designs characteristic of the Victorian and Edwardian eras. Their "Quadruple Plate" items are recognized by collectors for their craftsmanship and historical significance as examples of mass-produced, yet elegant, tableware.