Clocks
5 videos • 49 views • by Mark Frank
1
Charles Fasoldt's entry in the 1876 Philadelphia Centennial Exposition winning a gold medal.
Mark Frank
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2
Simon Napier-Bell, excerpt from TV documentary 1966
Mark Frank
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3
Dent epicyclical skeleton
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4
Big Ben replica video
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5
Triple axis escapement model
Mark Frank
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