A very nice and interesting collection! One of the reasons I don't sell, apart from the fuzz, is that I certainly will be sorry after getting rid of some of my watches. As long as there is no financial need (keep my fingers crossed and the lid on the till most of the time) I just will not do it. I like those gold ones with black dial, at the bottom of your picture: one square, one round. You still got them?
That reminds me of a story ten years ago. I wanted to buy the small Portuguese Automatic in rose gold, but I wanted it with a black dial. So I e-mailed IWC to ask whether that was possible: there was a steel version with a black dial, so why not combine them? No, it was not possible, was the answer, as it didn't fit in the model politics of IWC to have a gold watch with a black dial. So I bought the one with the white dial. Not too long after that a new Portuguese Chrono appeared: rose gold, with a black dial! No forum around, so I congratulated IWC by mail with their new watch.
Kind regards,
Paul