Your bottle is a bit puzzling, because Napoleon and XO are two similar cognac grades, and they appear at the same time on this bottle. I don’t know why, and generally XO is not written as X.O.
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Don’t think that the word Napoleon means it is called Napoleon Cognac. I have been working in the bar for more than eight years, and I can tell you that the real name of Napoleon XO Cognac is Courvoisier XO. It got its name because of this It is Napoleon’s official wine.