Antique Rim Lock

Steel case
Brass latch, sliding deadbolt and switch
Reversible to suit both left and right-handed doors

Approximate measurements:-
Width - 4 1/2" (115mm)
Height (max) - 3 1/4" (83mm)
Follower (knob) backset - 3" (77mm)
Follower opening size - 5/16" (8mm)

Lock is in very good working order. The original black paint finish has worn away (blacking paste has been applied to the case). Keep is missing (excellent cast replacements are widely available).