Now, when it's not on display, it is lowered into a four-foot-thick concrete, steel-plated vault... that happens to be equipped with an electronic combination lock and biometric access-denial systems.
[もくば, mokuba] (n) (1) wooden horse; rocking horse; (2) (See 跳馬) vaulting horse; horse used in gymnastics; (3) the horse (ancient torture device that one was forced to straddle with rocks hanging from the feet)