Sinn watch 104 st sa i w 104012 vintage leather sinn watches are renowned for their aviation inspired designs and this sinn 104 st sa i w 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 embraces the sw 220 1 self winding movement with 200 metre water resistance and anti magnetic technology the striking bidirectional pilots bezel with minute ratcheting also allows