I have a circa 1994 Polaris. Last time I opened the case to replace the battery, the metal contact that connects to the back of the case broke off. The broken piece is about 1mm X 6mm. Does anyone know how to repair? Cost?
Telling us where you are in the world would help. Photos would help. Introducing yourself properly would help.
1665 movement? That is the alarm contact I think. I too would be interested in hearing more about this since the alarm on my SM multifunction is very quiet.