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I really like to watch this show....This is interesting because these escapements were made by Charles DeLong, known as the greatest watchmaker of the 20th century, for Hamilton, Illinois and Ball.
http://www.pbs.org/wgbh/roadshow/fts/reno_200404A22.html
http://www.pbs.org/wgbh/roadshow/fts/reno_200404A22.html