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So I have a bulova pocket watch I am working on and it makes a knocking sound only when the watch is dial side up. The mainspring is correct so it's not the strength causing the knocking. The finger guard is good, no cracks on any of the jewels. It's really hard obviously to observe the escapement under my microscope while in dial side up to see what's going on, any tricks would be helpful. 

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I think I figured it out that it is the mainspring because I let down the power andvslowly started winding it and the knocking sound started closer to when it is fully wound. The weird thing is that the amplitude is around 270 when fully wound and I would expect that if the mainspring was too powerful that it would be well into the 300's

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    • Use a Portwest Howie lab coat. They are the biological type so they have tapped cuffs so you don't end up getting the loose cuffs of normal lab coats catching everything. 
    • Some of the Chinese tools ae great and can be purchased at a fraction of the price of Swiss ones, some are complete garbage and some I'm convinced are coming out the same factory as the branded ones.
    • I found this string about this problem. I've not gone through it all, but I believe it also mentions making a spring. If not in this string, the info is online.
    • No, I now realise it’s broken😥 ive looked for one online, but v. Expensive! im going to service as is, in the hope that  one turns up. Thank  you.
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