File:Howard astronomical regulator clock.png

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current14:00, 10 March 2009Thumbnail for version as of 14:00, 10 March 2009327 × 798 (54 KB)Chetvorno{{Information |Description={{en|Drawing of a precision astronomical regulator clock made by the E. Howard Clock Co., from a publication by Lick Observatory, CA, USA, 1887. Alterations to image: cropped out second drawing showing clock with case open an

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