Very collectible PF Corbin Rim lock - 4" x 5" with key, HORIZONTAL applications - patented April 2, 1878.
Catalog page from 1885.
Night lath slide on bottom of case. Round cast brass escutcheons with brass attachment hardware. Due to the many types of lock attachment, no hardware included.
All dimensions approximate. If additional data or information is required, please contact me. See pix.