Key, for Parautoptic lock, including: Display-set of fifteen changeable Key-Bits; Working-set of six changeable Key-Bits; Key-Bits Spindle; Key Shaft Spindle, with decorative end; and Chain attached to Key, by Day & Newell, Manhattan, New York, New York State, United States of America, 1851. Exhibited at the 1851 Great Exhibition, London, England.
Key, for Parautoptic lock, including: Display-set of fifteen changeable Key-Bits; Key-Bits Spindle; Key Shaft Spindle, with decorative end; and Chain attached to Key, by Day & Newell, Manhattan, New York, New York State, United States of America, 1851. Exhibited at the 1851 Great Exhibition, London, England.
Key-Bits, working-set of six, for Parautoptic lock, by Day & Newell, Manhattan, New York, New York State, United States of America, 1851. Exhibited at the 1851 Great Exhibition, London, England.