Quite the opposite. Agnelli favoured his Cartier Tank Americaine, an Omega Ploprof, and a Patek World Time. I couldn't find any pics of him with a Rolex. Perhaps he did have one.
In any case I was just stirring the pot. Cleav's fit was great as always. But his sartorial style, while it may doff its hat to Italian CBD from time to time, strikes me as firmly British.