I recently found a Ball Waltham Watch from about 1910. It has a Philadelphia marked case and looks like most Ball cases, but is NOT marked BALL MODEL as others I have seen. Has this watch been re-cased? Did Ball Sell watchs without the Ball Marked Cases? If so, when did that practice end? Thanks to all who enlightens me about all this.

Paul,

Yes, yes and approx 1900.

Thank you, Bill!