U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 583
0ftvt/&ritiri/. £. THE MOKRIS JTTERS CO. PHOTO-LITMO,, WASHINGTON. I (No Model.) 10 Sheets—Sheet 8. G. E. HUNTER. METHOD OF TESTING WATCH BALANCES AND HAIR SPRINGS. No. 490,203. Patented Jan. 17, 1893. … pjftovuk Jb, Q/faaaA({^ Ct^S^XUSX. ucmAAjJbLsjU*. Qffii^uisLyz- the Nofinis peters co. photo-litho. Washington, i (No Model.) 10 Sheets—Sheet 9. G. E. HUNTER. METHOD OF TESTING WATCH BALANCES AND HAIR SPRINGS. No. 490,203. Patented Jan. 17, 1893.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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