How to find compatible Inca shock spring

[utzelu]

Hi,

I am attempting to service a Poljot 2614.2h movement and unfortunately I broke the upper shock springs from the balance. It was rusted and the moment I touched it, one arm broke.

It seems replacement springs for this movement are nowhere to be found. Is there an equivalent spring I can use instead? Could you please educate me how to find and assess the fit?

Thank you

 

[oldhippy]

What suppliers have you tried?

[utzelu]

24 minutes ago, oldhippy said:

What suppliers have you tried?

Cousins and eBay. The issue is that I don’t really know how to assess whether another spring would fit the jewel from this movement. 

[oldhippy]

A movement of the same cal will be interchangeable. Here is one on ebay.

 https://www.ebay.com/itm/143545636933

[Neverenoughwatches]

14 hours ago, utzelu said:

Hi,

I am attempting to service a Poljot 2614.2h movement and unfortunately I broke the upper shock springs from the balance. It was rusted and the moment I touched it, one arm broke.

It seems replacement springs for this movement are nowhere to be found. Is there an equivalent spring I can use instead? Could you please educate me how to find and assess the fit?

Thank you

 

They are so fragile in good condition.  Once some rust is involved you know it probably isn't going to come out and go back in one piece. The harsh reality of vintage unloved watches I'm affraid. A really good close inspection of the movement when buying if that's possible

1 hour ago, utzelu said:

Cousins and eBay. The issue is that I don’t really know how to assess whether another spring would fit the jewel from this movement. 

Like OH said a donor movement is likely  to be your best option and will also give you other spares should anything else go wrong. Bere in mind the donor may also have similar issues though so try and aquire a good close up shot of the inside for inspection purposes . It's worth asking the seller to open up the back though some not willing to or can't accommodate.  Raketa parts do seem to transfer over ok. I fixed my grandfather's sekonda with a neighbourly escape wheel. Then nearly ruined the watch , but that's a very long story  told many times over and I'm fed up of getting upset about it  

Edited May 7, 2022 by Neverenoughwatches

[utzelu]

2 hours ago, oldhippy said:

A movement of the same cal will be interchangeable. Here is one on ebay.

 https://www.ebay.com/itm/143545636933

Thank you. I was planning to buy a spare movement, indeed, but was thinking if a spare new Inca spring would fit. I was browsing their catalog and they list them by movement brand and model, mostly Swiss. In theory as long as the dimensions of the jewel cup are the same, it should fit, right?

[oldhippy]

If the cal is the same which it is according to your post which you stated was  Poljot 2614.2h. The link I posted is the same cal and it has both shock springs. Yes that is what you need. Just be very careful with the little buggers as they are so thin and you an easily lose them.

[Kalanag]

28 minutes ago, utzelu said:

 I … was thinking if a spare new Inca spring would fit…

This Poljot springs are not genuine Incabloc. They are just similar. So it‘s questionable whether any Incabloc spring would fit imho.

Edited May 7, 2022 by Kalanag

[utzelu]

36 minutes ago, oldhippy said:

If the cal is the same which it is according to your post which you stated was  Poljot 2614.2h. The link I posted is the same cal and it has both shock springs. Yes that is what you need. Just be very careful with the little buggers as they are so thin and you an easily lose them.

Yes, I just ordered another 2614.2H movement from eBay (the one you posted was not shipping to my location). That should solve my current issue. But I was curious how one goes when there are no donor movements available. Is it just trial and error with other springs, or is there a standard based on the cup size?

[Kalanag]

1 hour ago, utzelu said:

…or is there a standard based on the cup size?

Unfortunately there isn‘t