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Idle-Tyme. The Original Rolling Ball Clock
Wooden Rolling Ball Clock
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Congreve rolling ball clock
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Sold at Auction: A GOOD MOONPHASE CONGREAVE ROLLING BALL CLOCK in a glass case. 12ins high.
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Lot - Congreve Rolling Ball Clock (Replica)
Vintage Congreve Rolling Ball Clock 8 Day Multi Dial Mantel Clock in Glass Case - Etsy Norway
The Rolling Ball Escapement – JBV Creative
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Bob Kojima's rolling ball clock
Congreve clock - Wikipedia
Congreve rolling ball clock
Mid 20th century 'Congreve' rolling ball clock, sloped arch and pierced brass movement, the central Arabic minute chapter ring flanked by hour and seconds dials, twin train driven eight day movement, -