Sinn watch 103 ti ifr 1030793 cowhide leather sinn watches have created an unmissable timepiece that not only looks smarts but meets the uncompromisingly high standards met by aircraft and helicopter equipment this sinn 103 ti ifr watch is one of the first timepieces certified in accordance with din 8330 meaning you get a high functioning and reliable piece of aircraft equipment to be worn on the wrist the bead blasted titanium case hides the valjoux 7750 self winding movement with 200 metr