I put it on. The bracelet feels hot against my skin. It itches and then it hurts, and when I take it off there’s a mark as if I’ve burned my hand in a fire. Each link has left a print. The horologist at Nardin is horrified. He will apply a hypoallergenic coating, he says, it’s never happened before, you usually only see that sort of reaction with impure gold, he’ll assay the metal immediately.