{"product_id":"original-c-1870-s-ornamental-cast-bronze-interior-residential-compression-cast-passage-door-backplate-with-incised-patent-date-around-the-thimble","title":"original c. 1870's ornamental cast bronze interior residential \"compression cast\" passage door backplate with incised patent date around the thimble","description":"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 \u0026amp; 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\".","brand":"vendor-unknown","offers":[{"title":"Default Title","offer_id":50670201372970,"sku":"UR-17707-13","price":250.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0959\/7075\/4858\/files\/20130611-011z_2.jpg?v=1760251943","url":"https:\/\/urbanremainschicago.com\/products\/original-c-1870-s-ornamental-cast-bronze-interior-residential-compression-cast-passage-door-backplate-with-incised-patent-date-around-the-thimble","provider":"Urban Remains Chicago","version":"1.0","type":"link"}