A Lange and Sohne have unveiled a pair of limited edition ... a perpetual calendar, a moon phase and a tourbillon. If you want a watch that really can do it all, this is it. Next is the Datograph ...

So, with all that said, let’s get on to what we believe are the very best tourbillons on the pre-owned market this week ... and this week we’re featuring the Royal Oak Tourbillon in stainless steel ...