Elgin National Watch Company was a company that made watches a long time ago. They were famous for making really good watches that people would carry around in their pockets.
They made lots of different kinds of watches, but they all had one thing in common: they had little gears inside them that helped them keep time. Just like how a clock has little gears inside that make the hands move, a watch has little gears inside that make the hands move too.
Elgin National Watch Company made their watches in America a long time ago, and people really liked them because they were well-made and worked really well. Unfortunately, they aren't around anymore, but their watches are still collected and valued today by people who appreciate their history and craftsmanship.