Sine qua non (SQN)

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 "The dangerous life of Manfred Krankl, the man behind Sine Qua Non, the most coveted California wine you've never heard of--there is, he says, a six-year waiting list to get on the list to buy his Syrahs, Roussannes and sweet Sémillons--turns out to be pretty seductive. Once you get used to it. " 

Richard Nalley . Forbes