a first glance I would say the watch must date from late 19th century-early 20thLepine with a double cuvette back and most probably an enamel dial.
NIce watch and even more important a wonderful heirloom
sorry I dont know what you meaning with scan of the movement.
thanks for the data alex.
In any event its a really n ice watch you have. Do you know how your grandfather came about getting it?
if you move the screen to de rigth there is one picture of de movement.
thanks a lot