u/Zestyclose-Koala-610

Edit: reposted with pictures.

Hi. I have this Breitling 769 Chronomat based on the case back. It belonged to my grandfather. I wound it carefully and it runs with all hands turning but stops after a while. There is some face damage between the 4 and 5 positions. A few scratches on the crystal. I’m curious to learn more about it, including how I should go about getting it serviced. I’d like to work it into my watch. rotation. I’m located in Ontario, Canada.