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Help Needed Regarding Omega Chronostop!!

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Omegachronostop Member

Omegachronostop

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hi, guys new to this forum so sorry in advance if this post is in the wrong place.

I recently received a omega chronostop 920 cal 1969 when my grandfather passed away and although it keeps great time and is in good condition the chronostop had was sitting a few seconds after 12 after abit of research came up with that its due to sloppy work when the hands were pushed on (correct me if i'm wrong) but after leaving the hand running by accident on resetting it went back the the 12 mark dead on. as confused as I was I was pleased it was corrected now after setting the hand to run again it wouldn't. and now the hand moves around the dial on wrist movement and every so often with abit tinkering moving the watch round on my wrist it will start running again. strange I know! is there a possibility the hands worked its self loose and just needs resitting on the stem correctly or is it a deeper problem within the movement?

                                    kind regards Ben

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Geo
Geo

Welcome to the forum Ben. What you describe is most cerainly a loose hand, I have had this problem with a couple of watches purchased from EBay. The movement will have to be removed from the case,

Geo
Geo

I'll remove the pusher from mine tomorrow and measure the screw for you.

Mark
Mark

No problem, I trust you have seen this one:  

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Geo Distinguished Member

Geo

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Welcome to the forum Ben.

What you describe is most cerainly a loose hand, I have had this problem with a couple of watches purchased from EBay. The movement will have to be removed from the case, and the hand pressed on again. I have one myself that is in bits at the moment. The chrono hand was that tightly fitted that the hand separated from the tube it is mounted on, luckily I managed to track down a new one. They are lovely watches!

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Omegachronostop Member

Omegachronostop

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Thanks for the welcome Geo.

 

that's great news by the sounds of it its a pretty simple fix? is the movement simple to remove and would I be able to do this my self? really would love the watch to be fully functional again as it has significant sentimental value as it was my grandfathers watch. took me a while to come round to getting used to the smaller face but yes indeed they are a lovely watch! mine is on the original black leather rally deployment strap with no27 deployment clasp sets the watch of lovely.

 

kind regards Ben

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Geo Distinguished Member

Geo

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Hi Ben, it is a fairly simple job to remove the movement from the watch, but you will require the correct tool. This would include a case back opener and a set of hand removers. The reason I say that you should have hand removers when the hand is so slack, is if you re-fit the hand and it is slightly out of register, you will have to pull it off for another attempt.

Unless you intend doing watch repair as a hobby, I would suggest you send the watch to a professional watch repairer (I would recommend Marl who runs the forum) to have the hand fitted correctly. Given the age of the watch, it more than likely requires a full service as well.

I hope you do get involved in watch repairing, it is a great hobby and you never stop learning, but I certainly do not suggest that you start with such a rare, beautiful and valuable watch.

Edited by Geo
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Geo Distinguished Member

Geo

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I meant to ask if it was the rarer drivers version with 12 at the three position? It would be good if you could post up a picture of the watch.

This thread has just fired me up to go and finish off mine, thanks for that!

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Omegachronostop Member

Omegachronostop

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i have done a little research on it and think i'm more than able to do it (famous last words) already got a case opener was just about to order some cheap screwdrivers of ebay to give it a go.

already had the case back off to have a look ect. looks pretty simple i think. grub screw slightly loosend then the two bigger screws on the case clamps and movements free am i right in thinking that?

unfortunatly its just the normal version but with the 920 date movement. will get some pictures up later today when i'm back at home.

no bother would be nice to see some pictures of other peoples too.

Ben

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Geo Distinguished Member

Geo

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i have done a little research on it and think i'm more than able to do it (famous last words) already got a case opener was just about to order some cheap screwdrivers of ebay to give it a go.

already had the case back off to have a look ect. looks pretty simple i think. grub screw slightly loosend then the two bigger screws on the case clamps and movements free am i right in thinking that?

That's pretty much it Ben, remember to protect the dial with a piece of polythene and make sure that the chronograph is zeroed properly.

Wishing you all the best!

http://www.watchrepairtalk.com/topic/331-omega-chronostop-problem/?hl=chronostop

Edited by Geo
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Geo Distinguished Member

Geo

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oh almost forgot to ask is there a possible way to clean up the markers on the dial at all as there abit tarnished and might aswell do that at the same time. Ben

I would only clean them with a clean piece of Rodico, it is all too easy to damage a dial finish. Even if there is a small amount of tarnish, it will not de-value the watch, overzealous cleaning or re-finishing will. I prefer to see an honest bit of age related degredation and would only consider re-finishing if the dial was that bad that it was illegible.

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WillFly Distinguished Member

WillFly

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oh almost forgot to ask is there a possible way to clean up the markers on the dial at all as there abit tarnished and might aswell do that at the same time. Ben

Geo's advice is good. A cotton wool bud - dampened with spit or a mild washing-up liquid solution - is a good tool for general dial cleaning. But it's very easy to dislodge markers when cleaning so I would be very tentative at first. Once again, a pic of the face would be of help in getting advice from forum folks. :)

Edited by WillFly
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Omegachronostop Member

Omegachronostop

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theres the pictures of the watch for you guys to cast your eye over. dont believe it just after i took the photo's the pushers came off :( reveiling the splined shaft (still attatched to the watch) and now i'm sitting with a small spring and the head of the pusher!! is there a way it goes back on or is it a case of a new pusher? not sure if there readily avalable? if so how will i fit it? feel like its one thing after the other.

- Ben

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post-448-0-75321100-1418144228_thumb.jpg

post-448-0-58436300-1418144262_thumb.jpg

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Geo Distinguished Member

Geo

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Nice watch Ben.

Don't panic about the pusher. Open the back of the watch carefully and you will find the small screw that holds it in place, it will probably still be in the pusher tube. You will definitely have to remove the movement to screw it back into the pusher.

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bobm12 Distinguished Member

bobm12

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Hi Ben, weclcome to the forum. As you can see, you are in good hands here, with all the sound advise. I would only add to be careful while handling the case in order to insert or take out the movement since it is easy to leave fingeprints on the inside of the crystal. If it happens then some glass cleaner on a lintless paper would wipe them out. Make sure it is completely dry before inserting the movement back and closing it.

Cheers,

Bob

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Omegachronostop Member

Omegachronostop

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thanks geo..  you certainly know your stuff!! will the rest of the pusher survive that process as they both use crowns in that thread? I really hope so.. yeah hopefully they can will any old screw do that's same length? how will I actually find out the screw length? Really glad I stumbled across you guys on here so much help.

Regards Ben

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