group of four salvaged chicago 1880's american eastlake style "ivy" pattern doorknob backplates with unique thimbles

four nearly identical salvaged chicago "ivy" pattern cast brass antique american interior residential doorknob backplates designed and fabricated by branford lock works, branford, ct. the doorknob backplates feature the hard-to-find diamond-shaped protruding thimbles. two of the four retain the original swinging keyhole covers. priced for the lot.