IWC Portofino(PORTFINO) unused Watch
Portofino Hand wind Mono pusher
Model number: IW515103
Product ID: W153967The mono pusher is a multi-function push button that allows you to start, stop, and reset the chronograph. When the push button is pressed, the second and minute hands of the chronograph start to move. Pressing the push button again stops the chronograph, and pressing the push button a third time returns the second and minute counter hands to the zero position. It also has a long power reserve of 192 hours.