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This lock was made by John Wilkes about 1680
It was used on the door of a room where valuables were kept
It has special security features
The lock can be secured quickly by simply cocking the hat
It is unlocked by turning the knob as the hat is pushed down
The soldiers leg conceals the keyhole
The key activates both of the bolts
A further turn fully shoots the main bolt
It is called a detector lock because it counts each time it is unlocked
This told the owner if the door had been opened in his absence
When the dial reaches 100, the main bolt can be locked but not released
A tiny button allows the dial to be reset
Modernised the inscription reads
If I had the gift of tongue, I would declare and do no wrong
Who you are that come by stealth, to impair my Masters wealth