Sinn watch 103 ti testaf 103079 bracelet 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 testaf watch is one of the first timepieces certified in accordance with the testaf standard meaning you get a high functioning precise and reliable piece of aircraft equipment to be worn on the wrist the bead blasted titanium case hides the valjoux 7750 self winding movem