Stephanos sent this Breitling Top Time in. It doesn’t run properly, so it needs a service, and the gold plating has come off the case and pushers.
This doesn’t look too good – the amplitude is barely there, the beat error is huge, and I can see that the balance hardly swings. Don’t be fooled by the two straight lines on the timegrapher. Unfortunately, the Witschi shows those when the performance is so bad that you would otherwise just have random dots on the screen. I prefer how my Chinese timegrapher displays this sort of thing.The movement is dirty, and on closer inspection, I notice that the hairpsring is deformed, and that it touches the balance in places.
The case, pushers, crown and bezel are sent over to Canada to Replateit.com.
I start taking apart the movement. I’m not quite sure if the yellow paint to mark the engraved text is original…
The wheel train is now visible.
The usual dirt around the clutch wheel, but nothing serious.
The bottom plate is fairly simple.
Out of the cleaning machine and ready for reassembly.
I start off with a new mainspring.
I start off with the base movement.If you click on the photo and zoom in, you can see that he outermost winding of the hairspring touches the next one. Somebody bent the hairspring to put a Breguet-style overcoil on it, which is wrong. The hairspring has to be completely flat!
Half an hour later, I have a flat hairspring again, and all is well.
And I am rewarded for that half hour. A great graph, great amplitude, great beat error.
Now I can put the chronograph back together.
The dial and hands go back on.
The case has come back from Canada, and looks great.
Back on its strap, and looking good.