Sellita SW220-1

Swiss-made automatic movement with day-date complication, used in the popular Sinn 104 pilot watch series. Based on the SW200-1 framework but equivalent to the ETA 2836-2 with the additional day wheel. Sinn uses the Premium grade version with a custom-engraved rotor. The movement provides excellent accuracy and reliability, typically achieving +/- 4 seconds per day in Premium grade. Also anti-magnetic in accordance with DIN 8309 when used in Sinn watches with their magnetic field protection.