Image: Yale lock, Otto's Encyclopedia
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Description: Yale lock, as pictured in Otto's Encyclopedia (Ottův slovník naučný, 1908).
Title: Yale lock, Otto's Encyclopedia
Credit: "Zámek." Ottův Slovník Naučný. Vol. 27. Praha: J. Otto, 1908. 418–420. Print
Author: Unknown authorUnknown author. The author of the picture is not given, but it is possible that it is Josef Pokorný, the author of the text of the encyclopedia entry.
Usage Terms: Public domain
License: Public domain
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