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Working on a Hamilton 992 with a dirty dial. A fine cleaning with Rodico followed by targeted removal of spots and blotches with a toothpick; and then a cleanup with Rodico and Ta Da.

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And the movement was cleaned with Rodico as well. Being very careful not to touch the jewel holes. This PW has a swing of 540 Degrees.

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8 hours ago, spectre6000 said:

How does that work?

Total arc of swing from extreme clockwise point to extreme anti-clockwise point is double the amplitude. So a swing of 540 degrees is an amplitude of 270 degrees. 

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Total arc of swing from extreme clockwise point to extreme anti-clockwise point is double the amplitude. So a swing of 540 degrees is an amplitude of 270 degrees. 

Thanks Marc. I usually use my iPhone in slo-mo to observe the swing. I also bought eTimer for looking closely at the performance. Would it be possible for you to make a video on how to use eTimer for diagnosing watch problems. Their manual is not sufficient.


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Wow.  That's not before and after--that's night and day!  What a difference.  Beautiful movement, BTW.  Great job! 

Thank you very much. Need to lean in with that toothpick


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9 hours ago, Marc said:

Total arc of swing from extreme clockwise point to extreme anti-clockwise point is double the amplitude. So a swing of 540 degrees is an amplitude of 270 degrees. 

 

4 hours ago, jdrichard said:

360 plus 180 :) Full swing. Amplitude is 1/2 that value

Right. Duh. I read it as amplitude. Don't usually see it stated in terms of full swing. Opposite of BPM and Hz. I think in Herz, but it's always stated in terms of BPM. 

4 hours ago, jdrichard said:

No. Used a toothpick to remove the yellow stuff!! Then cleaned up with Rodico.

So, you scraped every square mm of the dial with a toothpick, and yellow schmutz came off? Interesting... Seems like that's a porcelain dial-only strategy. 

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So, you scraped every square mm of the dial with a toothpick, and yellow schmutz came off? Interesting... Seems like that's a porcelain dial-only strategy. 

I scraped those areas with significant blemishes or moisture bumps, but I did do the whole dial carefully with Rodico


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