for Patek Philippe on a manual wind watch is the calibre 177 which can be found in the discontinued 3520D and also a ref which I love in rose gold at 32mm with Breguet hands and numerals. Sorry I cannot recall the reference. The slimmest automatic Patek is of course the widely regarded 240 which is you can find in the 5120, 7200 in its basic form ie two hands, no second hand.