U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 17
£-. ~us. w r^^ Jrtcf.5. … t. ^ iTuuerCboT*: (No Model.) 6 Sheets—Sheet 4. 0. E. LUNDSTEDT. POSTAL DATE AND TIME STAMPING MACHINE. No. 472,951. Patented Apr. 12, 1892, Fig. 6 IV.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-969-440.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-861-390.webp)
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten07unit-897-577.webp)
