Antique mortise lock with two white porcelain door knobs and shaft.  The brass faceplate measures about 5-3/8" x 7/8".  The black body of the lock has been painted white and measures about 3.75" x 3-1/8".  The shaft is about 0.25" square.  Condition is good as seen in photos.  Scratches, rust, tarnish, and other wear to the lock and shaft.  The knobs have minimal  wear but no chips or cracks.