Rockford pocket watch dating

Glass crystals were added to protect the dial but because they were translucent, they still had to be removed to read the time.English watchmakers added jewels (gemstones) in the 1700s as bearings in the watches to prevent friction and wear between metal parts.

Inventing the portable clock would bring great advances to civilization.Older English watches have hallmarks that can be researched to find the manufacturing date.Antique watches made on the continent in Europe are more difficult to date.It was the discovery of spring technology by Peter Henlein and others that made the personal timepiece possible.Spiral springs could be wound and uncoiled to move the hour hand of the clock.

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