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U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 441
JY Wi tries sea ¥§mm IriVeiitnr. D, PMOTO-LITHO.. V (No Model.) 3 Sheets—Sheet 3. F. TERSTEGEN. TIMEPIECE REPEATING MECHANISM. No. 487,399, Patented Dec. 6, 1892. Pier. 6. … Tiqz X-Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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