When it is associated with a perpetual calendar and a tourbillon under three gold bars, the Westminster chime minute-repeater becomes an extraordinary complication. This ultra-sophisticated mechanism nestles in a rose gold case. Through the dial cut-out, protected by a sapphire crystal, three of the four strike-hammers are visible, the fourth one can only be seen when the striking-work is in operation. Transparent back. The manual winding mechanism guarantees a power-reserve in excess of 75 hours.