I dropped an ETA 2472 and it stopped

[Lc130]

Hi All

I'm a beginner having "serviced" or restored about a dozen movements without killing them.  I dropped a newly acquired watch containing an ETA 2472 and it stopped.  Before I send it off to a real watchmaker, is there any checks I can do to determine what broke?  There's nothing obvious with the top incabloc.  The hands set.

Thank you

Charlie

[Nucejoe]

If balance wheel tilts as you try to lift one side of it with an oiler a pivot is broken.

[jdrichard]

50 minutes ago, Lc130 said:

Hi All

I'm a beginner having "serviced" or restored about a dozen movements without killing them.  I dropped a newly acquired watch containing an ETA 2472 and it stopped.  Before I send it off to a real watchmaker, is there any checks I can do to determine what broke?  There's nothing obvious with the top incabloc.  The hands set.

Thank you

Charlie

I the balance wobbly? Broken pivot?

[Lc130]

There's no play in the balance.

[Klassiker]

If you give the balance a gentle nudge or a puff of air, does it oscillate normally, or jam up on something? Is the hairspring tangled?

[Lc130]

2 hours ago, Klassiker said:

If you give the balance a gentle nudge or a puff of air, does it oscillate normally, or jam up on something? Is the hairspring tangled?

The hairspring is partially blocked from view by the autowinder but looks to be ok.  The balance swings with a puff in one direction but not the other.  Could it be the position for the impulse jewel and fork?

[Nucejoe]

5 hours ago, Lc130 said:

 The balance swings with a puff in one direction but not the other.  Could it be the position for the impulse jewel and fork?

Yes it can;  perhaps impulse jewel can't enter the fork horn, if the shock has  knocked a pallet jewel out of alighnment or bent a pivot.

Remove the two black screws then the automatic device, loosen the cock screw by couple turns, raise the bridge just enough to pass the impulse jewel over the fork so to get impulse jewel inside the horn, tighten cock screw.

It will run, however , might get stuck again if pallet jewels have got misaligned or a pivot has got bent.

[Klassiker]

9 hours ago, Lc130 said:

Could it be the position for the impulse jewel and fork?

Hi Charlie, you underestimate yourself. You are not really a beginner any more. You have identified where the problem is. Without removing the balance assembly and inspecting the pallet fork and the escape wheel, you can't diagnose the exact fault. Your watchmaker will be able to do the rest. You can try what Joe suggests, and it might run well after, If you are very lucky. After that, you need to decide between a DIY disassembly and parts inspection, or an immediate trip to a professional.

[Lc130]

Nucejoe was correct.  It appears that the fork got displaced on the other side of the impulse jewel.  Amazingly nothing broke and it's now working.  Thanks to everyone for the help!

Charlie

[Nucejoe]

Hi Charlie,   

  You did fix it yourself, didn't you?     Klassiker is right.

I think you decided to start all your posts this way, to spare us all reading comments that may sound discouraging.

Good luck pal.