It is designed in such a way the illusion tells you that parts are floating within the case.
4 mini micro stepper motors drive the movement of the four lubricant free timing belts mounting on jeweled bearings, moving efficiently and telling time precisely and accurately.
Time base is a temperature feedback Crystal provides the Clock base input to the micro-processor. Powered by lithium polymer rechargeable cell that can provide full stable power supply for 2 weeks before next Charge. Crystal is made for bullet-proof durability.
Imagine that small production volume will definite be not cheap. You can order at £15,000!