3 Answers

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The second job is keeping the balance swinging. This also happens at the moment the balance link unlocks the escapement. (Escapement enthusiasts will recognize a slight simplification here, but let's allow it for the sake of clarity). As long as the energy delivered is consistent, the balance will roman numerals for 1972 always swing at link the same rate.

When Patek released the 57111A to celebrate the Nautilus' 30th anniversary it also released the 5711J link 5711G and 5711R in yellow gold white gold and link rose gold respectively. The dials were complementary silver black and dark brown. These were produced from 2007 to 2009. At the time these were all offered only on a strap. They're not as covered or coveted as the steel 5711 for a reason The Nautilus is just meant to be worn link on a bracelet.