IWC (International Watch Co) is celebrating its third year of partnering with the Tribeca Film Festival by auctioning off a unique timepiece, with all proceeds going directly to the Tribeca Film Institute. The watch is the first of its kind. It’s a monopusher mechanical chronograph, so by pressing the pusher twice, it starts and stops the timing function of the chronograph, while a third push resets the hands to zero. The Portofino Monopusher will be auctioned online by Christie’s between April 1 and April 10. For more information on the timepiece, visit the IWC official site.