http://www.thewatchbox.com When it comes to collectible Rolex models, everyone watches the auction results and swears he "saw it coming." But if they did, wouldn't they have bought low and secured that future gold mine in the first place? Now you can. The Rolex Yacht-Master II ref 116689 in white gold and platinum may be the ultimate modern rarity. Shockingly expensive when new and often overlooked in favor of the cheaper stainless steel model, the most unique Yacht-Master II model may turn out to be the least common modern Rolex. Picking future winners is a fraught task for modern Rolex fans, and given the Geneva firm's one million+ annual production, it seems that truly rare, small-run models are a thing of the past. Consider the Yacht-Master II in white gold and platinum to be a rare exception. Not only did this watch cost a fortune when new, but it continues to feel like one in the hand. Its colossal mass of precious metal is breathtaking in the hand and on the wrist. The continuous sweep of white dial and bezel dispenses with the visual boundary of ceramic dial variants to create the impression of a much larger watch than the other Yacht-Master II models. It's still 44mm, but it has the wrist presence to trade blows with 48mm Hublots and 47mm Panerais. Inside the hulking case, a Rolex caliber 4160 programmable countdown chronograph makes the Yacht-Master II one of the most complicated and most useful Rolex watches of all time. From timing the breaks between business meetings to timing fish on the grill, this easy-to-use countdown timer finds applications that Rolex never imagined and owners find they cannot live without. This exceptional investment piece and collectible candidate is available from thewatchbox.com with full Rolex boxes, papers, and documentation of provenance: exactly the way Rolex collectors like their grail watches. Video and content by Tim Mosso.