
Legge A4 42 406 key refers to a specific, historical pre-cut 2-lever mortice lock key pattern traditionally manufactured by the historic British brand Legge.
These keys belong to a legacy series of numbered patterns used for internal timber doors and cabinet deadlocks.
Because they are pre-cut to standard factory patterns, you do not need to take a blank to a locksmith to be manually duplicated.
You can purchase them ready-made online by providing the exact pattern sequence stamped on your lock face or old key.