Re: How to key warded locks?
You can buy blank keys from some locksmiths or hardware stores. The size of the blank is determined by the tip diameter. If the tip is too large, you'll suffer needless work making it fit. Then it's a matter of taking the lock apart and looking at the warding. It can have three types: a nib on the edge of the keyhole requires cutting a slot lengthwise along the key tab. A circular trace inside the face of the lock requires notches in the parallel edges of the key. Finally, the one or two levers require notches in the contact edge of the key. Now, remember, these keys must get cut so they work from both sides' keyholes. I had a lock at a "locksmith" in town for 2 weeks, and when I got the lock back and installed it, I found that the key would only work from one side, and it was not the side my lady customer wanted to lock!
A couple of years ago I bought an antique lockset ****** for my screen door, of course the key was gone; I found a suitable old key to experiment with, and with a dremel and small files, cut a working key for it in under an hour.
Remove not the ancient landmark, which your fathers have set.