Pocket Watch Case

Broken Chronometer Running Pocket Watch Harman HXF 44mm Case 17j Vintage. The chronometer function is not working, the watch itself runs and keeps good time (I haven’t checked it for +/- accuracy but it keeps good time, at least over 24 hours the time isn’t noticeably off anyway). Case is 44mm wide. When the chronometer is started the sweep hand moves for about 5 seconds at most then stalls and ticks back and forth a tiny bit. After stopping the chronometer, the minute/sweep chronometer hands don’t usually return to 12 o’clock (and also I noticed many times when you start the chronometer the minute hand in the top dial advance suddenly to 4-5 o’clock position or other off position). You can get the hands to align if you start/stop/return the hands but they typically don’t align at 12 o’clock. Observing the movement I see that the seconds/sweep hand function is from the gear in the center of the movement (just to the left of the Harman Watch Co engraving). I think it is missing a jewel at that top post point (or missing whatever kept that top gear post in place). I had very carefully using a small plastic pointed tool gently guided that gear to stay as centered as possible and found that the chronometer sweep hand advanced, and it is clear that the gear is not secured at the top post. As far as the hands not returning to zero I don’t know what would cause that. The movement itself reminds me of how a wrist watch chronometer movement would appear. The stainless steel case has denting on the back. It snaps open/closed and is hinged, the snap feels like it’s wearing out (it stays closed but takes almost no effort to open). The front is snap off. Dial and hands look good. — See photos for condition details. — I don’t have a way to arrange for a local pick-up of this item, I’m sorry for the inconvenience.