Regarding your calibre 564, Desmond Guilfoyle has a lengthy assessment of the history of Omega calibres, and he makes the statement that mny consider the 564 to be the best production movement EVER! Shortly after I read his blog, I happened to find one at a Vancouver dealer (a Constellation) and the
I spent a day at the Omega Museum last year and M. Richon was still there at the time (I believe he has since retired) and he was very kind to me and graciously signed his book (which I purchased there), then they shipped it to me (very heavy at 900 pages or so). I had a wonderful time and since bou