So I'm not sure, whether it's the original movement or a replacement. What's funny as well is, that nobody in my direct family line ever lived in the states. So I have no clue, why my grandfather would own an american build pocket watch from around 1900. All I can say is, that this was one of his two "every day" pocket watch (the other being an 800 silver longines pocket watch). For special occasions, he also had a gold omega pocket watch with some sort of chiming mechanism. Not sure, which kind as it's not in my posession.