Just wondering do you know how many Tourbillons are made every year in GP? A few pieces? A few tens pieces? or A few hundreds pieces. I think you can find a better answer from Peter in the GP forum.
Let's assume that they made 300 pieces a year.
300 / 5%=6000.
If GP's tourbillon production were indeed less than 5% as Patek produces perpetual chronos, then you are effectively saying that Patek is making at least 6000 perpetual chronos in A YEAR! If they were making that much, I don't think people would be paying any premium in getting one.
Hmm... actually, you may be right... it is a fact that the GP Tourbillon is "rare".... especially amongst the grey dealers. I can barely see one for sale. If you compare it with 5970 in the grey markets, then there are in fact "many" 5970 in the "market" for sale. I am sure that any grey dealer will tell you that it is much harder to come by a GP Tourbillon than a 5970.
Just wondering if you don't mind (and absolutely no offense), could you share with us whether you get your GP Tourbillon from grey market ? If yes, did the grey dealer tell you that is is much harder to come by a GP Tourbillon than a 5970?