lassú asztal Különleges rolling ball clock dán Poláris tiltása
Rolling Ball Clock in British Museum - YouTube
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, -
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Congreve rolling ball clock
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Chronomeans is the finest rolling ball clock - YouTube