U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 209
cJUfir- THL KOA*[S KTtPS CO.. PMOTO-UTHO.. WA&KJNOTON, D. I (No Model.) 2 Sheets-Sheet 2. F. WELLEBA, Sr., F. WELLEBA, Jr. & L. WiCHTER. ADVERTISING CLOCK. No. 479,687. *r Patented July 26, 1892.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
