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  1. A great way to remember I'll have look and dig out the micrometer if they look too similar to identify. Thanks
  2. I've been trying to solve a problem on my Longines watch (see thread 'Diagnosing problems from Timegraph results') and last night I removed the upper and lower shock jewels to give them a better clean and oil. I put it all back and my problem is still there (low amplitude - circa 200 degrees). However, I discovered later that Longines list the upper and lower shock jewels as two different part numbers (370 and 371) whereas I had stupidly assumed they were the same. My question therefore; if the part numbers are different, does this mean the jewels differ from each other in some way? They
  3. In response to the possibilities mentioned in the last few posts, I stripped the watch down again and took a closer look at the wheels and jewels. As far as I can tell using a x7 loupe, the escape wheel/pinion/pivot is fine. Pivots don't seem bent or rusted. The pinion seems in good shape. The same is true of the other wheels. I cleaned the pivots using pithwood, pegged out all the jewels again reassembled and re-oiled. At the moment, after 12 hours of operation, the amplitude is around 215 degrees and the variation is still slightly there but far less pronounced. The amplitud
  4. Thanks Joe. I found that when I applied some pressure to the barrel (in clockwise direction with DD), I could get the amplitude up to well over 300 degrees. As said before, I don't have a spring winder but I am prepared to have a go at removing, cleaning and manually attempting to wind it in before purchasing a new spring. Is this the way to go or is has the spring lost it's tension? Incidentally it was still running at 40 hours.
  5. Ok, so would I be right in saying that the main areas of suspicion for the loss in power would be: Balance wheel pivot/jewels Escape wheel pivot/jewels Mainspring ? Would it also be correct to say that the rest of the train not as influential when it comes to power?
  6. I've attached screenshots of the watch after 24 hours of running and included the DD position Many thanks for the Longines documents!! No, not yet. I notice from one of the documents that you attached that the variations in output I'm experiencing could be due to magnetism on the escape wheel (or possible because it's out-of-round). Would this also affect amplitude? I opened the diashock springs and took out the endstones. I've double-checked and they are definitely the right way round. I'm not 100% convinced that the diashock springs are in good condition though. I mig
  7. Ok, I opened the barrel and cleaned the lid and oiled the shoulder on the arbor but as I don't have a winder, I decided not to risk removing and handwinding the spring. I reassembled the movement at took some readings at full wind minus half hour (as the spec posted above stated). I recorded three positions - DU, PD & PL. I also took scope snapshots at each position but using the program TG, as the signal amplitude on WOS is quite low. TG and WOS seem to give fairly close results most of the time.
  8. I searched the Cousins website and only found the 6 page version you speak of. Is the longer watermarked version on there? Regarding the length of times the movement runs, I haven't really tested it closely but I think I pretty much get 36 hours out of it but I will see, once it's back together.
  9. I'll reassemble later today and get some timegtaph shots in different positions and get a scope shot. Thanks for the attached docs too The movement is a longines cal 6942 The barrel says that the spring is 'self lubricated'. Obviously I need to do some maintenance on the barrel even if it's not the cause of all the loss in amplitide so what should I do to it if it says self lubricated, apart from check the arbour clearance ? I haven't looked closely at the escape wheel pinion, I'll do that later..thanks. So the lack of backlash on train wheels is possibly because I'd alre
  10. I've just check this and the train runs very well with one or two clicks but the escape wheel doesn't reverse when it stops. It sort of continues creeping in the same direction for a bit. Does this mean the mainspring could be a problem?
  11. They all moved freely - although I didn't check with just one or two clicks of wind They seemed ok, but I will re-check The mainspring and barrel are the two things I did not open - although you indicate that the amplitude probably hasn't got much to do with this? Again, I didn't check with one or two clicks but it seemed ok - another thing to go back and check Yes, they are fine - removed shock springs and cleaned the endstones and oiled (9010) I dd peg them but probably not very well. Need to do them again. They weren't oiled afterward Probabl
  12. As a noob, I've serviced a Longines watch recently but there are a couple of issues I have noticed when putting it on the timegrapher (screenshot attached): 1) There is a variation that occurs every 5-6 seconds - what could be the possible cause? 2) The amplitude, although much better than before the service, is still low - again, what could be the cause/s? The servicing included a complete strip-down, cleaning all parts, reassembling and oiling.
  13. Well I happen to have a watch that I do really like and that I want to service, but I'm not touching it until I've got a fair few repairs/teardowns/reassembly of junk watches under my belt - so I think it is very sensible advice. I also have an Omega Speedmaster that I'll never ever EVER attempt to repair/service myself because that was my dad's watch and it is a lovely piece and I want it to stay that way. Although it's been annoying having these problems, I have learned a lot from the mistakes I've already made and I dare say I'll probably be unlikely to make those particular mistake
  14. Just an update to this (for any future searchers), I took a gamble and ordered a pallet fork for a 536 Cortebert movement and it was exactly the same as the original and fitted perfectly in the 534 movement. So, a good result. Everything was fine......until I made yet another rookie mistake - I removed the pallet bridge to look at something else but the watch was under power - disaster!! Because the balance wheel was not installed, the tension from the escape wheel fired the pallet fork out the movement and caused the exact same damage as before - a broken pivot on the pallet arbor Back
  15. Thank you, that's really helpful
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