The International Silver Co. Hamilton, Canada 980T mark signifies a piece made by the Canadian branch of the International Silver Company, based in Hamilton, Ontario. The 980T is a pattern or model number, often linked to flatware or hollowware produced for institutional or domestic use. This mark highlights the company’s international presence and its production of high-quality silverplate items for both Canadian and North American markets. These pieces are valued for their craftsmanship and historical connection to Canadian silver manufacturing.