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Old 16 May 2014, 05:47 AM   #1
Supernew
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found a screw inside the case of a Tudor (with picture)

Hi everybody, first post here :)
Nice forum, loads of useful advices :)

[IMG][/IMG]

Tudor 7928 is from 1963
It comes from my grandfather, he said it stopped but I wind it and it came to life..for a day. Stopped again by itself. I opened it and found this very tiny screw (very tiny, more than any other visible) with no visible place to put it back. screw was the problem, stuck in the balance. Now watch is running good, checked with android timing machine.

Movement is in good order but now the rotor is loose, I may have forced it when serviced because before I never noticed the noise it emits when you shake the watch.

How can I remove the rotor?
do you have any explanation for sudden rotor loose an dscrew inside case??

Sorry for my english, it is not my language :)
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Old 16 May 2014, 06:48 AM   #2
Vincent65
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take it to a watch-maker - and how did you open the case?!
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Old 16 May 2014, 07:12 AM   #3
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loving the clamp ,,, take it to some one who knows ,,, it will be cheaper in the long run
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Old 16 May 2014, 07:34 AM   #4
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watchmaker job imho
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Old 16 May 2014, 07:39 AM   #5
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Quote:
Originally Posted by Vincent65 View Post
take it to a watch-maker - and how did you open the case?!
Quote:
Originally Posted by dysondiver View Post
loving the clamp ,,, take it to some one who knows ,,, it will be cheaper in the long run
Quote:
Originally Posted by crowncollection View Post
watchmaker job imho
This

Get it to someone that knows these - far too nice of a piece to screw it up
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Old 16 May 2014, 07:42 AM   #6
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I opened with the ball trick, works fine. I just coles it immediately as you can understand I just open watches for very simple things, usually I make decent jobs. This time I am just curious about what it is, I know it needs a watchmaker.
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Old 16 May 2014, 12:24 PM   #7
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Ok my eyes need a repair too.. I didnt saw that the small X part on top of the rotor is not solid, is has a cut so it can be removed, I discovered that seeing the pictures, even with the loupe I didnt saw that.

About opening the case I have this method, I use a gum tape that is used in hydraulics it is black and it has no glue but sticks a lot especially when stretched. I put a piece of that and than rotate with a soft juggling ball. I opened any kind of screwed case, it is safer than usual way, impossible to scratch or bend something (even pressure against case), I didnt believed the videos until I tried. my opening tool is on the dust since that day.

The clamp is the worst money can buy but the cheap plastic is wonderful, it does not scratch because is soft, it holds perfectly (for simple works or opening with the ball at least).

Anyway I still have to figure where the screw should be, didnt dismounted the rotor because I don't feel comfortable to do that until I dont' know exactly what I will find under that and how difficult is to put it back. I found the replacement rotor with bearing, I would love to have an exploded view or something that explain how the tudor is assembled, just to know what I have, for the science :)

Also I wish to know cross reference for bezel inserts and bracelet ends, this has a 65 and 381 but I know it should have 382..mistery.


Thanks to everybody, I know you love watches more than I love discovering how they are made and how they should be repaired :)
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Old 16 May 2014, 02:41 PM   #8
R.W.T.
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Where is the picture of the screw?
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Old 17 May 2014, 01:10 AM   #9
Supernew
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Where is the picture of the screw?
Here,
thanks for your interest I am puzzled by that thing
[IMG][/IMG]
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Old 17 May 2014, 01:11 AM   #10
Supernew
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Here,
thanks for your interest I am puzzled by that thing
[IMG][/IMG]
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Old 17 May 2014, 02:34 AM   #11
R.W.T.
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Not a 100% guarantee...but it appears to be a dial fixing screw.

I'm not that familiar with the ETA movement. Is the watch functioning properly?

If it is I wouldn't worry about it until it ceases to do so. Keep the screw and when you have it serviced give it to the watch maker and tell him you think it is a dial screw.

Otherwise he will be very upset because he can't find one...lol! They are very often missing one or both.

Since the movement is properly mounted in the case and the dial is in place and contacting the inner portion of the rehaute the screw is not necessary really as the case is holding the dial in place.

Like I said no guarantees but it looks like that is what it is and you can see no similar screws on the movement itself and any holes where it might have come from?
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Old 17 May 2014, 02:59 AM   #12
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Turn the rotor and check to see if there is a hole for a screw around the outside perimeter of the
movement. That would indicate the screw is for holding the movement in the case, as the above
Poster mentioned. The screw looks too large to used in the inner movement, IMO.
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Old 17 May 2014, 03:12 AM   #13
R.W.T.
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Oh and sorry that is a 390 not an ETA. 99% it's a dial screw.
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Old 17 May 2014, 07:56 AM   #14
Supernew
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Really thank you. Dial screw sounds possible but hole is not visible, is this normal?

Is it possible for the rotor loos to be a quick fix? I am almost sure it has been loosened by strong vibrations. Honestly the watch is perfect, if I can fix the rotor I can avoid shipping to repair (I hate to send that kind of things).
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Old 17 May 2014, 11:20 PM   #15
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Looking on the net I found this
http://www.rolexforums.com/showthread.php?t=205929
where they say that this replacement works
http://www.yukiwatch.com/catalog/ite...64/7570529.htm
is it true for my movement?
I wont ship that thing and discover it is gone. I wear it all the time and want to keep using it. I don't care about ho wmuch original is inside, I Acn always keep the original roto until I fin d abetter solution. Even use it without rotor can be an option if it is safe for the movement. please let me know your opinion.

I found those numbers on back, what they mean? It has been told me that was never serviced now I know it is impossible right?
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Old 18 May 2014, 05:05 AM   #16
R.W.T.
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The dial screws go into the side of the movement. Parallel to the dial. The feet are perpendicular and stick down through the top plate and the dial screws go in and contact the sides of the feet post. So you won't see the holes. They can work themselves out from vibration and then it was rattling around inside your case.

Your movement is not an ETA. The ETA came later. Yours is a Tudor Calibre 390. It was made by FEF for Rolex. Your's is a completely different animal.
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Old 1 June 2014, 03:13 PM   #17
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Thanks to your help I looked at pictures of the 390 movement on internet and also found a part list with pictures, probably the screw is supposed to be radial mounted to this is the reason why there is no visible hole to put it back. Thank you I think you solved the mistery.

Still working on the rotor problem, I think it exist a replacement because I saw picture of a fake rotor but no way to know where to buy it.
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Old 1 June 2014, 03:24 PM   #18
R.W.T.
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Quote:
Originally Posted by Supernew View Post
Thanks to your help I looked at pictures of the 390 movement on internet and also found a part list with pictures, probably the screw is supposed to be radial mounted to this is the reason why there is no visible hole to put it back. Thank you I think you solved the mistery.

Still working on the rotor problem, I think it exist a replacement because I saw picture of a fake rotor but no way to know where to buy it.
So the rotor is giving trouble. I've not much experience with them but the reversers are quite a problem with these I know that much and they are very hard to come by new ones.
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