IWC does change its models more than Rolex
..and I'm not sure this is undesirable to anyone.
When I first learned that the pilot's watches were being redesigned --which was much earlier than the announcement in 2006-- I questioned Georges Kern, IWC's CEO, about that. I asked if it wasn't smarter to have some iconic (there's that word again) watches. He replied that virtually no one in the watch industry did that, except Rolex.
I mentioned Patek, and he replied that the basic perpetual (the 3940) and the Calatrava were being redesigned. I thought of the Audemars Royal Oak, but then again realized that the models had changed in size, dials, etc. (now the Alinghi models, etc.). He said that the life cycle for any watch product today is much shorter than it used to be, with the one exception of Rolex.
I think that means we will see new dials, new housings, etc. over time. Yes, the "essence" of the model may be there but there will be changes.
For the collectror, it means that the old (or current) models might be the ones to get and preserve. But it also means many new opportunities for the current collector. Properly done, I think it's a win-win, even if icons may have shorter production lives than Submariners.
Regards,
Michael
P.S. I have no inside information, and there's no hints here, about any changes planned in the Aquatimer models.