Screw the lock body to the door

Dating door knobs

Avoid pairs that are missing their

Again, fill in any holes that may already be in your door. Hold the lock in position against the face of the door and mark the center of the handle spindle and the key hole.

Avoid pairs that are missing their spindles or setscrews. Using a drill, make holes through the door for the spindle and the key hole. Add a vertical center line to aid drilling. There are more metal types but those are the ones most used for antique and vintage hardware.

Using a drill

The year it was made can also give a good indication of which is which. Insert mortise lock and screw faceplate to the door. For an exterior door mortise lock with two keyholes only drill through the door for the lower keyhole. If there are no holes cut in the door it would be the same as with an antique door. Then ease out the indentations made by the chisel to give you your recess.

For the upper keyhole drill half way through the door from the exterior side. Drill a smaller hole below the first and join them with a small saw or chisel. They provide everything but the doorknobs themselves. It is also very forgiving with old houses settling as they frequently do. Today, they are mined like diamonds at salvage yards and flea markets.