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praezis

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praezis last won the day on September 29 2018

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About praezis

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  1. First, the shown deeper lock (esp. 2nd photo: too deep) seems not very likely to reduce the amplitude so much. If it is a pallet or a banking pin issue, is not difficult to find: essential is the point, where the wheel tooth hits the pallet jewel. The pallet fork must move a bit more then for security, until stopped by the banking "pin". If this movement is considerable, the banking pins (hrer: gap) are too wide else the pallet jewels are too long. Frank
  2. Did you buy that set because of that black stamp? Probably someone can say "Mission accomplished" then. Else such tools are unmarketable today. Even in 1944 (wartime, always desirable items) that set was outdated by far. Frank
  3. Hi CB, can you explain more detailed, how to distort the banking pins for higher amplitude? Sometimes I would love to apply such distortion... Frank
  4. Sometimes this is the "reward" for cleaning well. If you do not want to change to a thinner mainspring (the usual remedy), you can open the banking pins a bit. This will take more energy from the escapement during unlock. Frank
  5. Mainspring sizes of 4033 are: 1.40 - 10.5 - 0.11 according Flume tables. Frank
  6. Not a real Breguet coil and a good bit out of center, but I'd say: not bad for the 1st time! Frank
  7. As clockboy advised: easiest is a new (blued) hand. Length must match, at least not shorter. Bore of the tube (probably 0.26...0.28mm) can be adjusted. Else a new tube can be made and rivetted to the hand. Frank
  8. Hello Ken, regarding age, complexity and probable wear of the movement, I would say the estimate is reasonable. You will have to pay similar for European/US service by experienced pros. The chronographs coming from Asia to my workshop were all butchered in some way and in worse state than an defective but untouched watch. If the watch is worth such investment will be your decision. Frank
  9. In the 1st picture it looks like the lower part of the pallet fork (between banking pins and balance) is bent. This makes your problem. Frank
  10. Funny, but - you cannot pay incredibly low prices and expect professionally executed tools. Not fair IMHO. Some of the cheap tools can be improved easily with little effort to get a still cheap but usable tool. E.g. change the brass screws against steel ones for few cents in the above mentioned Indian screwdrivers. You can even use swiss blades. BTW loose screws and dropping blades will annoy you with swiss/french screwdrivers, too! For years now I use a cheap Indian sliding pin tong for holding certain barrel arbors. Initially a ridiculous tool, after machining the suitable opening it serves its purpose perfectly. Frank
  11. If something is near to rocket science then making of a correct Breguet coil. Encouraging a beginner to it is like advice to ruin the rest (we saw this just recently). How can you determine the coil number and the right shape (depending from that number) by watching a video? Not mentioned the special and rare tools that are needed for the work and were discussed here recently. Frank
  12. Looking at above pictures, I am quite sure, this is the original hairspring that once was a Breguet one. You can see where the up bend is/was. However someone (carlos??) bent the overcoil and formed a "flat" hairspring. Reshaping is nothing for beginners! Frank
  13. NOS escapement wheel and pinion of a wristwatch: 1. Seat of the wheel 2. Tips are peened and bent with a bored punch to rivet the wheel to the pinion. If you want to re-use a pinion, you can try to flatten back the tips in the lathe, using a pivot file. Frank
  14. Hi, wheels are rivetted onto the pinion. Yes, if it is a new, never before used pinion. Honestly, I am astonished on this question by you. Frank
  15. To calculate, you need teeth numbers of wheels and pinions and known revolution times (e.g. 2nd wheel, 4th wheel). Once I calculated these times for a calibre that I often work on (18000, small second): 1 tooth of the barrel (=2nd wheel pinion tooth) = 5 minutes 1 revolution 3rd wheel = 7.5 minutes I found that most often the tooth is to consider, less often the wheel. Frank
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