File:Giovanni Di Dondi clock.png
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![File:Giovanni Di Dondi clock.png](http://upload.wikimedia.org/wikipedia/commons/thumb/a/a3/Giovanni_Di_Dondi_clock.png/497px-Giovanni_Di_Dondi_clock.png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:03, 21 June 2008 | ![]() | 964 × 1,162 (72 KB) | Chetvorno | == Summary == {{Information |Description={{en|Drawing of the bottom section of Giovanni de Dondi's astronomical clock, the Astrarium, finished 1364, Padua, Italy. This early weight-driven clock kept time with a balance whe |
16:57, 1 July 2007 | ![]() | 400 × 507 (23 KB) | Chetvorno | == Summary == {{Information |Description=Drawing of Giovanni De Dondi's astronomical clock, built 1379, Padua, Italy. This may be the earliest known drawing of a balance wheel (crown shaped, at top) and a verge escapement (wheel under it). The balance w |
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