SARPANEVA K3 Northern Stars - "One of the Ten" (Pre-Owned)For his iconic moon phase watches, Stepan modifies the quick set calendar mechanism of the Soprod A10 caliber to work perfectly as a moon phase complication. Stepan introduces a wheel with 59 teeth (two teeth for each day of the 29. 5 day cycle) in place of the date wheel which ordinarily has 31 teeth. He then takes added steps to ensure the mechanism will not break should the hands move in an anti clockwise direction. On the reverse side we find yet