The application replicates the Magsonic Grande Sonnerie with extreme accuracy. The high resolution 3D model allows a complete interaction with the watch functions as well as the possibility to explore it, up to the smallest mechanical details.The sounds reproduced by this virtual watch are sampled from a real Magsonic and combined together to produce all the different notes sequences of the Westminster chimes while respecting the harmonic richness of the original watch. The selector buttons integrated into the side of the watch can be activated. The cross-shaped pushbutton on the case middle at 9 oclock serves to start the minute repeater, while pivoting ridged function selectors on either side of it enable the user to choose respectively between grand and small strike, and between chime and silence modes. The moving parts of the Tourbillon mechanism, the dial indicators and the hammers of the sonnerie are activated by a software system specifically developed for this application that elaborates the time flow and translates it into animations and melodies.While interacting with the watch, it is possible to rotate the viewpoint in any direction and modify the zoom extents at the same time, as the whole environment is a virtual reconstruction based on the latest 3D real-time technologies