Horological Meandering

close friend asked me how i was able to tell a piece (franck muller) was using a 7750 and it was hard for me to explain, besides saying.. look at it.. its 7750 looks like every other 7750.. and then he asked me the difference between column wheel chrono a... 

Hi Riley, This is a link to a pretty good article that might shed some light. http://www.hautehorlogerie.org/IMG/pdf/why_men_love_chrono.pdf Hope it helps. respo