The bridges of the automatic skeleton movement are finished in Milano Blue, creating a striking backdrop for the exposed mechanics. Through the openings, the two series-coupled mainspring barrels can be seen, contributing to the 60-hour power reserve, while the movement of the gear train adds another dimension to the visual experience. Precisely satin-finished surfaces and hand-executed anglage catch and reflect the light across the various levels of the movement, emphasizing its architectural depth. The hand-applied hour markers in 18-karat rose gold echo the case, as do the skeletonized, signature Delta-shaped hands indicating the hours and minutes. The finely knurled bezel is another characteristic feature of the Tonda PF. Its precisely worked surface captures the light from different angles, adding a subtle play of reflections around the mechanical composition.