Firstly welcome to the forum.
They will run fine for years without much attention but do need servicing.
My guess is that you need to get the watch serviced. I would not run it any more to avoid costly damage.
Does the second sweep move smoothly all the way around the dial?
They will run fine for years without much attention but do need servicing.
My guess is that you need to get the watch serviced. I would not run it any more to avoid costly damage.
Does the second sweep move smoothly all the way around the dial?