I have had had this watch for a few years. I bought it from the Brad Ross estate with the movement in pretty bad shape and had taken it to Denis Carignan last spring to have it serviced. I do not know how I overlooked this other thread in June 2019 but I was very busy at the time and did not see it. 1860~ James HODDELL & Co single roller fusee in 18K BALDWIN & CO convertible case This one is running vigorously but the balance was in such bad shape and likely a replacement that it was decided to "make it run" and not be concerned about the timekeeping. I have been looking at it for several hours this evening and I have not been able to figure out how to reconfigure the case. Denis had it for about 9 months and said that it did convert between HC and OF, but I have not yet sorted it out. I would appreciate any suggestions.