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In 1893 Yale catalog page 209, 1897 catalog page 98 and 1899 catalog page 675. This knob is also listed asL-12400. Attachment is based on U.S. patent 253956 by Warren H. Taylor and assigned to Yale Lock.

Specifications

School / Style
Romanesque
Manufacturer
Yale & Towne
Circa Dates
c. 1893
Classification
Category H
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H-48800