All of these keys show different Keyway Warding profiles.
They are a set illustrating various profiles which were later adapted
to the Pin Tumbler Keyways.
Basic Warding has changed very little from the antique keys over time.
Your father looked for each different type to round out the collection.
These keys were designed so that any attempts to cut down a Master Key
would weaken the metal to the point of breakage when placing the torque needed
to turn the Lock Bolt.
So you may ask how do I know?
OK fair enough.
Because I tried to Master these types of Locks my self
by cutting down a generic profile, as part of my Investigative Lock work.
Brian ………………………………………..
