I'm seriously considering a 42mm Radiomir & have been interested in the 512 since it was introduced several yrs ago. However Panerai has just announced the 620 which is an automatic (vs the 512 being a hand-wind). The 620 has the '9', the 512 doesn't, the 620 also has 'AUTOMATIC' written on the dial. Which do you prefer?
I prefer the manual wind 512