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original c. 1870's ornamental cast bronze interior residential "compression cast" passage door backplate with incised patent date around the thimble

original c. 1870's ornamental cast bronze interior residential "compression cast" passage door backplate with incised patent date around the thimble

SKU: UR-17707-13
highly detailed and finely executed original 19th century antique american ornamental cast bronze doorknob backplate. fabricated around 1870-75 by the metal compression casting co., boston, ma., russell & erwin mfg., co., new britain, ct. the interior passage door plate contains a single keyhole with swinging cover lost long ago. very fine and crisp casting detail employed through the compression casting method patented during the late 1860's. the backplate contains a lightly incised design patent date around the collar or thimble. uniform surface patina. 6-1/2" x 2".

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