126201

is its physical composition, patented by Rolex as . This involves a calculated juxtaposition of industrial resilience and precious metal luster:

(Made of nickel-phosphorus, rendering it insensitive to magnetic interference) Hairspring 126201

Standard pink gold alloys can lose their luster over time when exposed to chlorine, seawater, or sweat. To counteract this, Rolex developed and patented Everose gold in 2005. By adding a specific percentage of platinum to the gold and copper mix, the alloy locks in the pink hue permanently. is its physical composition, patented by Rolex as

(Tested strictly after the movement has been cased) is its physical composition