This watch appears to have begun life as a model with sweep seconds hand. Missing is the sweep seconds pinion, bridge for the pinion, retainer screw, sweep seconds pinion tension spring and screw. Dial appears to not be original to the movement, owing to the sub seconds hand. In order to achieve this, I suspect the fourth wheel from the sweep seconds movement would have had to be substituted by the fourth wheel from a sub second model. Missing the retainer screw for the winding stop click! In the modern vernacular, a “hybrid”.
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