Sellita SW400-1

The SW400-1 is an automatic movement manufactured by Sellita in Switzerland. It has a 31.00 mm diameter and operates at 28,800 vph with a power reserve of 38 to 41 hours, featuring Incabloc shock protection and a ball-bearing rotor. The movement includes a date complication and is a larger variant of the SW200-1, designed to fit contemporary men's watches of 40 to 46 mm without requiring a movement spacer.