Early 1900 (first appeared in CORBIN catalog - 1905) 0567 large commercial (store) door lock. Massive face plate. LH hinge application only.
Two keys.
Case size 5 1/2" x 4" x 3/4" thick - approx.
3/8" square spindle hole
Faceplate 7 1/2" x 1 1/4" x 3/16" thick brass approx.
Mechanism works smoothly.