IF you cannot do the trade this way, then why not... 3 Rolex for this Vacheron, which is one of the more exquisite Perpetual Calendar Chronograph. With a hinged case back, if my memory serves me well.
Did you see it in the metal? It is a 39 mm case, which is perfect to me, but a bit small for others, and big, with a 14 mm height. I tried it in platinum and loved it.
But you won't sell it as easily as the three Rolex you want to trade, so you'd better be sure...
Best,