six matching original and intact early 20th century antique american residential passage door mortise locks designed and fabricated by the p. & f. corbin co., new britain, ct. the fully functional mortise locks contain cast brass face plates with the original copper-plated finish largely intact. the latch and dead bolts are in great shape. the mortise locks were salvaged from a chicago residence built in 1910. priced for the lot of six. measures 5 1/4 across the strike plate and 3 1/4 x 3 1/4 inches in the lock.