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Posted

Hi guys,

I'm working on an Invicta Pro Diver, model 8926, with a NH35A movement.  I bought it to practice on.  I had no trouble removing and re-installing the cap jewels on the balance cock and plate.  But I struggled for an hour trying to get the cap jewels back into the automatic winding works, when suddenly my luck (of not losing the parts) ran out and both the jewel and spring flew off never to be found again.  The jewel is about 1 mm and the spring is 1.7 mm. 

After searching for both online the only thing I can find for a jewel is a bag of assorted jewels; is this what folks do to replace a jewel, buy an assortment and hope one fits??

On the spring, again I can only find assortments and the pictures of the bags of parts don't even show the style that I have.  What do folks do in that case?  Is the only option a donor movement?

I'm already $60 into this watch, by the time I'm done I could have bought a new one.  hahaha.  but what fun would that be?  Thanks. 

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Posted

You guys are great.  first, i was wrongly looking up the invicta watch model instead of the movement number.  second, i didn't think to look on alliexpress, but there they are, both the spring and the jewel.  i better order some extra in case they fly away again.  thanks guys.

Posted

Fairly sure those parts on Ali Express are balance wheel jewels and springs, not the smaller ones that are for the Escape and Third wheels that are on the automatic works/train bridge.

  • 4 weeks later...
Posted

For third and escape wheel upper cap jewels i use seagull 1.00 x 0.14mm  (J66703 from cousinsuk) in 7s26 and nh3x movements. Shock spring is 015.703.

 

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