First watch with a split flap display

The new Epic SF 24 world timer is the world’s first watch with a “split flap” display. Travelers are familiar with split flap display boards, which are used in airports and train stations around the world.

Also called Solari boards (named after Solari di Undine, the Italian firm that manufactures them), the giant boards display arrival and departure information via a system of letters and numbers on hinged flaps. The flaps rotate speedily with a distinctive spinning sound, like a deck of cards in the deft hands of a casino dealer.

The Epic SF 24 (the SF stands for split flap) watch uses the mechanical split flap technology in a world-time display that sits at the top of the watch. A cylinder contains two split flap systems, one showing the hour in a second time zone; the other showing the second-time-zone city.

The watch displays cities in 24 time zones (hence the 24 in the name). The wearer adjusts the second-time-zone display via a pusher on the side of the cylinder. A two part sapphire crystal covers the second time-zone display.

The watch comes in rose or white gold ($101,100) or titanium ($79,800) and has a diameter of 45 mm. The skeleton hands on the rose-gold version shown here are also made of rose gold. The openworked dial has a micro-blasted gray center.

The self-winding Swiss-made movement is the Concepto Caliber 2220 made exclusively for Jacob & Co. The GMT-SF 24 module was developed for Jacob by Studio7h38. The movement has a power reserve of 40 hours.