SCP-914 is a large clockwork device weighing several tons and covering an area of eighteen square meters, consisting of screw drives, belts, pulleys, gears, springs and other clockwork. It is incredibly complex, consisting of over eight million moving parts comprised mostly of tin and copper, with some wooden and cloth items observed. Observation and probing have showed no electronic assemblies or any form of power other than the “Mainspring” under the “Selection Panel”. It might be sentient.