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These watches had to meet strict accuracy standards (e.g., within 30 seconds per week).

Search for catalogs from Hamilton, Elgin, or Waltham from the same era. 1818_016.jpg

Often hosted on legacy image platforms like Photobucket. These watches had to meet strict accuracy standards (e

This specific image appears in specialized horology and history forums, such as Watch.ru , where users discuss the intersection of timekeeping and railway history. such as Watch.ru