Could be...but unlikely.
TAG Heuer did buy a few watches in the well publicised 2010 Bonhams auction- but I'd be surprised if this one linked back to TAG Heuer.
May make sense to push up the value of the Monaco and Carrera given those models stay in the collection, but hard to see the incentive behind a one-off Autavia sale.
I reckon there's a fair chance we'll hear more about the buyer...give it a couple of weeks