This example was made about 1893.
Convertible movements can be assembled in either hunter, or open face configuration. Note that in the this image there are two places the winding arbor can do. One is straight up, and the other is to the right.
There is a two-piece bridge over the winding arbor locations that can be assembled to drive one way or the other, when winding. When setting, an exposed center wheel in engaged.





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