A Scratched and Gouged Hamilton 4992B

Paul_S

NAWCC Member
Mar 27, 2015
189
7
18
North Carolina
Country
Around a year ago Dewey posted pics of a 992B with gouges carved from the gold screws.

I thought of that when cleaning this watch for a friend: a 4992B.

Someone went to town on nearly all the screws.
attachment.jpg

When replacing the staff, he scratched an arrow on the balance arm to show the stud position.

attachment.jpg

Most odd, though, is the collet. It looks like most of it has been roughly carved away. I'm not sure what would cause someone to do that.

Sigh...

Are these the sorts of things the military watchmakers did when trying to quickly turn-around a watch, or is this just another example of bad work in general?
 

Attachments

doug sinclair

Registered User
Aug 27, 2000
14,364
63
48
Calgary, Alberta
Country
Region
Irony:???:? What was ironic about my reply? That is a typical hairspring collet for all the 992B movements, and clones! As to the obvious problem someone had in poising the balance wheel. These are a friction staff, not riveted. And usually require little effort to poise. If you see something wrong with that reply, make your point!

And my name is DOUG! Not Dough.
 

Skutt50

Registered User
Mar 14, 2008
3,819
225
63
Gothenburg
Country
I am sorry DOUG. Diod not mean to offend you.

I work mainly on european watches and compared with the collets I have come across, the collet looks like it is half a collet. If that is the way the 992B are supposed to look then I stand corrected and I am glad I learned something new today.
 

Paul_S

NAWCC Member
Mar 27, 2015
189
7
18
North Carolina
Country
Sorry for my bad picture, but the collet is sort of smashed and a little shaved, like someone staked it on off-center.

As for the poise, so much weight was taken from so many screws that it is hard to know what the person was doing.

The scratch marks (like an arrow on the arm) make me think this was serviced by a military watchmaker---it seems more likely that they'd do it to a military watch than a civilian would later---but that's just conjecture.
 

NC Plumber

Registered User
Jan 15, 2011
413
22
18
Country
I've replaced collets that looked much better than that one. Appears that it's gapped open on one side of the staff, I don't think that it is gripping very well or perfectly centered. Someone other than a watchmaker has been working on that balance.
 

Jim Haney

NAWCC Member
Sponsor
Sep 21, 2002
6,909
1,643
113
71
Decatur, TN.
Country
Region
I've replaced collets that looked much better than that one. Appears that it's gapped open on one side of the staff, I don't think that it is gripping very well or perfectly centered. Someone other than a watchmaker has been working on that balance.
Yes, You have hit the nail on the head.

If someone who even had a small amout of repair skills they could have used the meantime screws to achieve what they were trying to do with drilling out material from the screw heads.
 

ANDY YALE

Registered User
Jun 14, 2013
476
6
18
Jersey City, NJ
Country
Region
looks like the upper pivot got bent in the process. what gets me is what was used to reduce the screws? the gouges are all off center.
 

karlmansson

Registered User
Apr 20, 2013
2,759
176
63
Linköping, Sweden
Country
looks like the upper pivot got bent in the process. what gets me is what was used to reduce the screws? the gouges are all off center.
Probably a cutter/drill held in a pin vise. And as for the collet it looks like someone tried to grab it in a collet of some sort. Maybe for closing it. Or grabbing it in order to turn it and subsequently slipping.
 

Forum statistics

Threads
165,388
Messages
1,439,522
Members
86,191
Latest member
skwolff
Encyclopedia Pages
1,101
Total wiki contributions
2,873
Last edit
Weekly News 7/7/19 by Tom McIntyre