A tribute to Sir Edmund Hillary that passed away this week.
I found it very interesting that he dedicated the bulk of his life to improving the lives of the Sherpa's and local Nepalese and Tibetan villages by fundraising, charities and environmental conservation.
Good question you pose Gil.
Mine gets less wear sheerly based upon the heft and energy to wear the chuck o'watch that particular day , but my crystal is part of the current Chieftang double AR run and the Lello date wheel will be swapped out next, so I suspect it will get much more wrist time after that.
I've read that some 1575 are indeed marked 1570, so that's certainly possible. I'm not an expert but I believe it's also a matter of a few different parts for the GMT function.
The guy that owns Jewelryandwatch.com will convert a 1570 to a GMT as part of his service building a franken 1655.