The power reserve is indicated in linear fashion, repeating the innovation presented in 2005 on the Paramount Square model. The challenge was to combine the Tourbillon with a power reserve with a linear indicator, all inserted in a 36 x 36 mm case. The watchmakers opted technically to move the power reserve from 4.30 o’clock to 10 o’clock, thereby making space for the Tourbillon cage. This change in the power reserve location also forced the watchmakers to develop a conical train differential mechanism, replacing the flat differential and creating the space required to attach it to the barrel located at 12 o'clock. An ingenious rack system (straight moving part fitted with teeth) was developed to transmit the power reserve in a linear fashion.


Source: Europa Star February-March 2009 Magazine Issue