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Mainspring ETA 7750


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If you are talking about putting oil on the coils of the spring, personally I think you are fine not putting any oil at all. Greasing the barrel walls should be enough, put the new spring in, arbour in, and lid on. I am not sure what the ETA instructions guide says, but the difference in end result should be negligible

 

 

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1 hour ago, Michael said:

Greasing the barrel walls should be enough, put the new spring in, arbour in, and lid on.

HP-1300 on the arbor, where barrel and lid turn is actually a good idea.

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