My Breguet Marine 5817ST has a different looking balance spring setup than the pics I have seen from others on the web. In the picture below, mine is the one shown surrounded by a red box, whereas the pic to the left of it is one that I found on the web.
The other pic shows a + and - adjustment, whereas mine does not seem to have that. Does that mean that mine has a silicon balance spring?
I don't really care one way or the other. I know that there are both advantages and disadvantages to silicon. I'm just curious which one I have.
Thanks for any information!