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Dating my elgin pocket watch
A famous train wreck on the Lake Shore and Michigan Southern Railway in Kipton, Ohio on April 19, 1891 occurred because one of the engineers' watches had stopped for four minutes. Ball as their Chief Time Inspector, in order to establish precision standards and a reliable timepiece inspection system for Railroad chronometers.
This led to the adoption in 1893 of stringent standards for pocket watches used in railroading.
maya and aiji dating - Dating my elgin pocket watch
Peter Henlein, a master locksmith of Nuremberg, was regularly manufacturing pocket watches by 1524.
These 'clock-watches' were fastened to clothing or worn on a chain around the neck.
They were heavy drum shaped brass cylinders several inches in diameter, engraved and ornamented. The face was not covered with glass, but usually had a hinged brass cover, often decoratively pierced with grillwork so the time could be read without opening.
Also common are fasteners designed to be put through a buttonhole and worn in a jacket or waistcoat, this sort being frequently associated with and named after train conductors.
An early reference to the pocket watch is in a letter in November 1462 from the Italian clockmaker Bartholomew Manfredi to the Marchese di Mantova Federico Gonzaga, where he offers him a "pocket clock" better than that belonging to the Duke of Modena.