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Swatch ETA 2840 Walkthrough Based on a summary research, this movement is very similar to the ETA 2801 et al family. Nevertheless, Ranfft doesn't list it as part of that family and instead says it is made only for swatch watches. All in all, the movement comes encased in a laser sealed case made of either plastic or metal. They are supposed to be throw away/disposable watches not meant to be serviced. The plastic crystal is supposed to be buffed when scratched, not replaced, since, again, it is laser welded to the plastic case. The irony models usually have a pressure sealed backs, being reinforced with a metal ring at this area, and can be opened. Due to the nature of those cases, movements can be found in almost pristine condition once the case is opened. That is, they mostly fail at the lug area where it attaches to the band (plastic breaks). At times, the case ruptures and then the above does not apply. Also, there exist a belief that in order to fix something in these watches we need to break something to get at it. Example, break the crystal and cut the stem, to get to the movement. Again, it is not necessary in some models. @My friend Colin: If you are reading this, it is with great pleasure I will be using the cases you so kindly gave me. I know it has been a while but for a busy hobbyist like me, things take time...but they get done...eventually! Always a pleasure to say hi! So without much ado here is the disassembly of a Swatch ETA 2840: Swatch ETA 2840 Walkthrough.pdf To be continued..... Due to time constraints, I had to do a pdf for faster download. Hope it works well. Cheers, Bob

Hi All . Well I finally got an Astronaut !! I had been searching for a while , and bidding once in a while , but just missing on closing the deal at the last seconds a couple of times . I had this one in my Ebay watch-list and decided to pay a little more for one that had just been serviced by a watchmaker that specializes in accutrons , in New York . I made an offer that the seller accepted . The seller lives in Virginia . When I got the watch I could not set the hands so I contacted the seller . He in turn contacted the watchmaker who said he guarantees his work , so send it to him and he would take care of the problem . The seller paid for the postage and $500 insurance to New York and the watchmaker paid for the postage to get the watch back to me . It was delivered today and runs great . I had a new crystal waiting for it and I Installed it this evening .... I'm stoked . The attachments are the sellers pics ....... The watchmaker installed an Accucell 1.35 volt battery , which is the original operating voltage for the Accutrons . The actual watch with new crystal and the watchband look much better than the pics .

No problems ro63rto, Mike

Thanks Geo. Some of the case refinishing I do I learned from this forum...and mostly from you! :) I do the trick with the stick contoured in the shape of the surface to sand and all. Just trying to get better at it...I was never a good student, master! :) In any case, the dilapidated Seiko in the "before" picture is the state I get the watch in, then I try to do something about it. This specific model the 4205 is a work in progress that will have pictures after I'm done. Thank you for the encouragement! Cheers, Bob

Great presentation Bob. I serviced one if these so called sealed for life Swatch watches a couple of years ago. I'm looking forward to seeing the end result.

Interesting :) Sound good . Have two nice ETA dials that would fit a 2840 movement . Would be fun to build something from them .

Hey, Alaskamick from Walsall. Please don't read anything harsh into what I wrote. Certainly wasn't having a go or anything.

Found this site with all the right names on different watch parts . Maybe in here already? http://people.timezone.com/library/horologium/horologium631670585403408066

I need your help to identify a set I recently purchased. Does anyone know this model? Also I would like to hear about the things you guys do with your own staking tools. I have never used one of these and I only know that they are useful to replace balance staffs. Thanks.

It would be nice to have a much better picture of the balance wheel with the hairspring and the stud. So as mentioned from others it can be fixed providing not too much is gone. The more that's gone the more complicated it becomes. Broken at the stud just requires pushing out the old pin and re-pinning. Then yes you're going to be running fast you might be able just regulated. More than likely you will need timing washers for the balance. Fortunately it looks like you have timing screws and you can put the timing washers in pairs under the screws.. The timing washers come with specifications of how slow they will make the watch depending upon the size of the balance wheel. Then a course you're going to have to put the watch back and beat but I assume everyone checks that with their watches they work on anyway? Then all of this is dependent upon your skill set at working with hairsprings. To give a clue of the skills required look at the link previously given on hairsprings. At all a nice pictures to successfully made hairspring and does he mention how many hairsprings he went through to get here? This is almost no longer done at that school due to the fact that getting raw hairsprings is exceedingly difficult. In the schools previously that did this the students would go through hundreds of hairsprings learning how to do this now they're given a very limited quantity and at some point in time this will no longer be taught in schools because there will be no hairsprings left.. So you're going to need some practice if you haven't done this before whatever you do do not practice on this watch. Otherwise you're going to need a balance complete which probably isn't available or if it is is going to be expensive.

Just did some googling.. apparently the Rolex used the brand from 1919 to 1933. After that it was not Rolex. Anil

Interesting interview with the great man, can you believe the interviewer was actually wearing an Apple Watch in front of him tho?!

That lever holds the end of the hairspring, and used to adjust the beat. Do not adjust it. There are many posts on the forum about setting a watch in beat, but you will require a machine called a timegrapher and knowledge to do this.

****UPDATE**** Today I took the time to take the movement out of the case and work on it. It took me a couple of tries, but I finally got the balance wheel in the right position and the old Seiko is working again. It may not seem like much, but I am very happy I was able to get this done and it has built my confidence in tackling other jobs. Thanks to everyone for their advice.

Looks to me like the impulse jewel is on the wrong side of the pallet fork. I would say the same thing Marc.

Looks to me like the impulse jewel is on the wrong side of the pallet fork. If you are comfortable with handling balances then it could be as simple as taking the balance assembly of and putting it back with the impulse jewel the correct side of he fork. The question is how did it get like that? It must have had one hell of a whack.

You may find these useful to have for the future. Bergeon watch winders - brilliant little gadgets, especially if you have to wind up twenty watches on test every morning :) Bergeon 30409A & 30409B