Sinn 103 st diapal 1030616 leather sinn watches are renowned for their aviation inspired designs and this sinn 103 st diapal watch continues this tradition by bringing to life an aesthetic reminiscent of cockpit navigation clocks and their rapid and clear readability the polished stainless steel case which ar dehumidifying techonology hides the valjoux 7750 gmt self winding movement with 200 metre water resistance and temperature resistant technology the striking bidirectional pilots bez