Chubb detector lock
...that the Chubb detector lock was developed in 1818 in a competition sponsored by the British Government to create an unpickable lock and remained unpicked until 1851?
...that the <b id="mwBc0"><a href="./Chubb_detector_lock" id="mwBc4" rel="mw:WikiLink" title="Chubb detector lock">Chubb detector lock</a></b> was developed in 1818 in a competition sponsored by the <a class="mw-redirect" href="./Her_Majesty's_Government" id="mwBc8" rel="mw:WikiLink" title="Her Majesty's Government">British Government</a> to create an <a href="./Lock_picking" id="mwBdA" rel="mw:WikiLink" title="Lock picking">unpickable</a> lock and remained unpicked until 1851?