balance cock How to replace a Broken balance cock jewel spring in vintage rotary

[Elii]

I am not a watchmaker but just an amateurs. Servicing a vintage rotary which was beating erratically i noticed that  the spring that hold the jewel on the cock is broken. It seems that I have to dismantle the part of the cock that hold the shock assorbent mechanism. How to do that?

Help please

Elio

[Geo]

First I would like to welcome you to the forum Elio.

Regarding your problem, it would help others to give advice if you could post a good quality close up picture of the movement,

[Cad101]

Hello and welcome Elko. What type of spring is it a nice close-up pic would help.

[Cad101]

Whoops Geo bet me to it 

[Cad101]

Whoops again my tablet decided to call you Elko sorry about that Elio.

[Vich]

Hello Elio and welcome,

The chaps are ready and willing (once given a tad more info). That's one of the many things so good about this forum.

Cheers,

Vic

[Elii]

Thank you for your prompt replay. 

The watch is rotary 17 jewels incablock. The movement is Mark as A60 425. There is also a picture of the dial side which shows the normal no broken spring. The spring is that type that opens like a door. I apologise for my poor vocabulary of watch parts.

[Cad101]

Hello sorry for the late reply I forgot about your post. looking at your balance cock I don't think you have to remove your incabloc setting to add a new spring it looks like it slides in from the side next to your regulator arm in pic 2 which is the clearest. You can find sets of springs on the net or you could measure the length there is detailed explanations on how to do this on the net if you do a search. Also you may have to unclip your regular to fit the spring but remember to disconnect the hairspring from the regulator arm first by releasing it from the pin and boot your best bet is to remove the whole balance wheel from the balance cock just to be safe and be careful removing the regulating arm if you have to it can be easily snapped.