I was actually hunting for an 8171 after seeing your post with the trip to HK. I missed one that was listed in the Collectors Market by a couple of months. But then I came across another opportunity to get a watch I yearned for in the 90's. But it is not a Triple Calendar, but as mentioned, is regarded by many as one of the most beautiful moonphase watches ever, the Pocket Wristwatch, the Original Portofino, the rare IWC Ref 5251. But one day I will pair it up with an 8171. I know I need to be quick as the prices of your 8171 are going through the roof!