Goldenlutin
261
About the peripheral automatic winding system...
Hello Nicolas,
Thanks for your answer. Basically the interesting/useful thing about a peripheral automatic winding system is that it can be set around the movement, adding virtually no hight to the movement (like the last ultra-thin Breguet tourbillon shows). As it is around the movement, the downside is that it increases the diameter, what you can see in the 33mm diameter here (unthinkable 15 years ago). AP also uses a similar system to make its RO automatic tourbillon chronograph (I am not talking here about all the movements with peripheral rotor but only the ones totally around the exterior of the movement) . Regarding the fact that it is visible dial side, I think is was a purely aesthetic decision but I might be wrong. AP's one is totally hidden by the case/dial for instance, making the automatic winding "magic".
Still, the most intriguing thing IMHO is really the flying balance. This seems technically almost impossible (due to shock protection [where is the upper Incabloc?, there must be none], fixing the hairspring, frictions, resistance to lateral shocks, etc.). It will be very spectacular in any case but hopefully also reliable. You could have achieved something visually similar using a sapphire top bridges.
Best,
Goldenlutin