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Cracked Jewels "Click" to Login or Register 
IHC Life Member
Site Moderator
Picture of John J. Flahive III
posted February 24, 2014 07:53
I recently bought a non-running Hamilton 992 movement with a good staff. After taking it apart, the only thing I can find wrong is three cracked jewels. Does anyone know where I can find these parts?

Thanks,

John III
 
Posts: 1755 | Location: Colorado in the USA | Registered: October 17, 2005
Picture of Billy Kuhn
posted February 24, 2014 07:59
Buy a parts movement. Take the jewels out of the parts watch. My be someone would have the jewels. Witch jewels are broken??

Thanks
 
Posts: 1012 | Location: Killen, Alabama in the USA | Registered: January 15, 2013
IHC Life Member
Site Moderator
Picture of John J. Flahive III
posted February 27, 2014 20:20
The upper and lower center jewels are badly cracked. A third wheel jewel has a crack line in it, but the wheel turns freely.

For some reason, I have not been able to find any of these jewels from Hamilton parts suppliers, but I know that this is an easy fix for most watchmakers. Where do they get the jewels?

I am working on getting a parts movement, but I would also like to find a supply of jewels.

Thanks,

John III
 
Posts: 1755 | Location: Colorado in the USA | Registered: October 17, 2005
IHC Member 376
Watchmaker
Picture of Samie L. Smith
posted February 28, 2014 11:52
John what is the serial number on your movement also do you know the pivot size on the wheel ,i might have what you need.
 
Posts: 3208 | Location: Monticello, Kentucky U.S.A. | Registered: June 24, 2004
IHC Life Member
Site Moderator
Picture of John J. Flahive III
posted March 02, 2014 07:52
Samie,

Thanks for the offer. I have a 992 serial number 868851 which has a double roller. The upper and lower center jewels are cracked badly although the wheel spins freely when I assemble the top plate.

Measuring with a digital caliper, I get 0.86 mm on the dial side pivot and 0.43 mm on the bridge pivot.

John III

 
Posts: 1755 | Location: Colorado in the USA | Registered: October 17, 2005
IHC Member 376
Watchmaker
Picture of Samie L. Smith
posted March 02, 2014 12:24
John send me a email i have trouble geting a new email too work but can reply just fine,,

I most likley have the parts you need if not i can replace the jewels in your settings
 
Posts: 3208 | Location: Monticello, Kentucky U.S.A. | Registered: June 24, 2004
IHC Life Member
Picture of Patrick Wallin
posted March 09, 2014 21:13
See what Samie comes up with and then let me know, I have boxes of loose jewels so let me know the sizes of the ID and the OD and the thickness and pivot size. It may take a few days to sort all this stuff but I might be able to help you.
 
Posts: 1732 | Location: Enumclaw, Washington in the USA | Registered: October 02, 2011
IHC Member 1736
posted March 10, 2014 18:45
I've had good luck with donor jewels with screwed down settings. I've had zero luck harvesting jewels pressed in to the plates.

Crack or shatter them every time.
 
Posts: 2032 | Location: San Diego, California in the USA | Registered: August 30, 2012
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