1914 model 1892 Waltham CPR, as sold by Eaton's department stores! Still good to within a few seconds a day.
The bezel and back are the same thread and interchangeable, so sometimes I'm tempted to swap them and wear it with the movement showing instead of the face.
Patek never finished anything as nicely as these old American made railway pieces.
And how often to you get to wear a beaver in your pocket.