File:LEI0060 186 Leica I Sn.5193 1927 Originalzustand Front-2 FS-15.jpg - Wikipedia
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Leica Ads Paul Comon Camera Advertising History Print Ads 1920s-1991 Photography 9780962650819 | eBay
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Leitz Leica camera advert, late 1920s. Rights information: Cleared for Editorial Use Only. Please Contact Us For Any Other Clearance Rights" - TopFoto
Leica's Early Years, "Little Negatives Big Pictures" — cameraville
