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Impulse jewel lubrication


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I've been servicing movements for a couple of years now and am slowly getting the hang of it.  I lubricate pallet stones with 9415 but have never thought about whether I should lube the impulse jewel.  Is it a case , like pallet fork pivots, that the torque is so small that lubing the impulse jewel will kill amplitude?  Apologies for yet another lubrication question but my searches have not yielded any guidance on this particular subject.

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