I am considering a choice between a tourbillion watch and a chronometer (JLC Master Date Tourbillion 39 vs. Patek Phillipe 5270)
Accurate time keeping is what I desire for discussion.
I am uncertain which mechanism (tourbillion or chronometer) would be expected, in a general sense, to give you "better" i.e. more accurate time keeping.
Of course, I am referring only to (high end) mechanical watch and not hybrid like Grand Seiko Spring Drive with an inner heart of quartz crystal.
Look forward to your opinions.