It Is Amazing,

that over 340 years ago,

British locksmith John Wilkes developed this 'Smart Lock' 

the key itself looks like a work of art, but here is the thing,

it’s called a "detector" because it features a dial that counts the number of times it’s been opened without the owner’s consent. On the surface you see a man holding a pointer. A tiny button on the man's jacket resets the counter back to zero. The lock can be quickly (but less securely) activated by tilting the man's hat, and then unlocked by turning what looks to be an ordinary pull knob while simultaneously holding the hat. A key is required to fully activate both of the locking bolts, but the keyhole is hidden behind the man's swivelling front leg, all of this thought out over 300 years ago, amazing!