Dating ward lock guides Lanka sexwab
c1780 – second hands began to be added to longcase clock dials.
c1785 – dots in the minute rings of brass dials were added c1745 – phases of the moon were introduced on clock dials .
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c1800 – reverse-painted glass tablets date from the early 1800’s.
c1820 – wooden movements were generally used in early American shelf clocks until around 1820.
Up until then hand cast and finished brass movements were very expensive.
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Chauncy Jerome began manufacturing cheap 30-hour brass movements in the 1830’s; by the early 1840’s brass movements virtually replaced wooden ones.