Losing time

[martijnp]

Hi guys,

 

A very generous member gave me his Breitling Navitimer because he didn't wear it anymore. It's a one year old watch and it's bought from Trusty. I think it's a 7750 but I'm not sure because i'm still a complete noob regarding machanics/movements. The second hand should stand stil at 12 but it runs. Also the sec at 9 runs. The pushers doesn't work, I think it's missing something and that's why the pushers don't work. The watch is also losing time, how can I fix this? I enclosed a picture of the movement.

 

Thanks in advance!

 

 

[jpz5142]

Curious if it's loosing time since the main spring can't provide enought power to run both the movement (time) and the chronograph? Have you tried either keeping it on a winder or manually winding it to give it as much of a wind as possible and see if it is still loosing time?

[martijnp]

Curious if it's loosing time since the main spring can't provide enought power to run both the movement (time) and the chronograph? Have you tried either keeping it on a winder or manually winding it to give it as much of a wind as possible and see if it is still loosing time?

Thanks for your reply! I had the watch on my wrist for a whole day and was already losing time, set the time right and put it in the winder and when I woke up it was running behind again.. 

[ceejay]

Yes that's the A7750

Unfortunately a advanced movement to work on, there is at least 1 piece missing that I can see and if you look at your picture, at the 1 o'clock position above that red circle half of that screw head is missing.

The chances of an inexperienced person repairing that (if you can get the parts) is almost zero.

A watch running slowly can be for a number of reasons again none of which a inexperienced person would be able to repair on that movement.

Sorry to be the bringer of bad news but it will probably be cheaper and easier to put in a new movement.

If you do then have a play with the movement to get some experience of it.

[martijnp]

Yes that's the A7750

Unfortunately a advanced movement to work on, there is at least 1 piece missing that I can see and if you look at your picture, at the 1 o'clock position above that red circle half of that screw head is missing.

The chances of an inexperienced person repairing that (if you can get the parts) is almost zero.

A watch running slowly can be for a number of reasons again none of which a inexperienced person would be able to repair on that movement.

Sorry to be the bringer of bad news but it will probably be cheaper and easier to put in a new movement.

If you do then have a play with the movement to get some experience of it.

Thanks for the comment and thank you for verifying it's a 7750!  The screw your talking about isn't missing but it's broken, the half of the top is on it but the screw is actually in the movement

Can I put in every A7750 movement? If I search on the bay I see some from 200 - 800 usd.. Here on RWG where some A7750 movements for 200 usd. Buying the movement and sending it to a good watchmaker might be the best solution here. Thanks again Ceejay!

[martijnp]

I've got the movement running, it's not losing time anymore! (don't know what I did though )

The chronograph is still running all the time, I want to stop it but I don't know how because I miss a part. To be specific: Part # CS 55.041 is what I have circled.  It is missing the end of the lever that depresses the "start/stop" on the chronograph cam (part # CS 55.200). 

 

This is what Mikemcnair said, he helped me out this far