The Tiffany 20423 11184 mark is found on sterling silver pieces crafted by Tiffany & Co., a premier name in American silver design. This dual-number marking system includes two catalog or pattern numbers—“20423” and “11184”—which together help identify the specific form, variant, or production batch of the item. These numbers are crucial for tracing a piece’s origin within Tiffany’s extensive archives and confirming its authenticity. Often used on hollowware or custom silver designs, marks like this reflect Tiffany’s meticulous record-keeping and attention to detail. For collectors and appraisers, the 20423 11184 mark offers a reliable reference for determining provenance, age, and value.