U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 195
SLUoirtntvt) THg NORRIS PCTt#3 C . WASHINGTON. DC (No Model.) No. 479.379. 5 Sheets—Sheet 4. E. & H. C. STOCKWELL. TIME LOOK MECHANISM. Patented July 19, 1892. … *P9- *
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
