I was hunting it for a while without any success, so I went for the rose brother instead: I would be curious to see them together and check the differences. ...
For those who don't know: The iconic YG/champagne dial Lange 1 (191.021) is available only from the 7 worldwide Flagship Boutiques, with prior purchase required, at a price point about 12% higher than an RG or WG L1 (191.032/191.039).