particularly the scarcity of 5070 platinum which lasted just one year in production. Hence its high premium which the potential buyer is willing and prepared to pay. In terms of finishing the question of which movements is better is debatable but I venture to say both are equally superb. Seasoned collectors generally prefer the older and out-of production 5070s. The new Patek chronograph movement came about as a result of the production of genuine in-house movement of Lange 1815 and Datograph. Scarcity, unique and desirable Patek timepieces, rightly or wrongly, generally command high premium in secondary market. The 3700 Nautilus "Jumbo" steel is one such timepiece that is so sought-after though it housed a 3rd party movement (JLC caliber 920) which was shared with both AP Royal Oak and VC.