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spring led them to observe that the energy actually reaching the spring remained ... fitted a smaller balance using less energy but which nonetheless lost a ... could achieve extremely fast automatic winding one and a half hours in a chappuis ... autonomy now won through this automatic winding calibre i then knuckled down to the ... were required before this automatic winding movement that is unique in the world ...

precision timekeeping moreover its fast winding mechanism designed to ensure high ... to a depletion of the initial amount of energy this original and perfectly balanced ... useful power-reserve for a automatic winding movement without compromising precision ...