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  1. mynikko

    18K Henry Sandoz 1/4 Chronograph/Repeater Pocket Watch

    Oh, I forgot to mention. Never trust the timing machine because you never know the frequency of the pocket watch. It's rare that the watch is off as much as an hour. Even if the hairspring was replaced, the last guy who was capable of replacing it probably would not have left it as is. Make sure...
  2. mynikko

    18K Henry Sandoz 1/4 Chronograph/Repeater Pocket Watch

    Just replace a few pairs of balance screws. One hour is still fixable this way unless the amplitude became a issue. The max ever I corrected was 2 hours if I remember correctly.
  3. mynikko

    Information request for these minute repeater models

    For your second question, I think the short answer is NO; it's not worth re-casing unless you are a watchmaker and do it as a hobby. A good condition minute repeater in 18K case with movement like yours (except the middle one) will probably sell for 3K on the market. Minus the gold value of 2K...
  4. mynikko

    longines blue jewels

    I also have a Rolex with blue jewels, although I am not sure which company OEM for Rolex at the time. Interestingly, I bought this pocket watch in Japan, so wakitisyo is probably right.
  5. mynikko

    18K Henry Sandoz 1/4 Chronograph/Repeater Pocket Watch

    Hello, It is interesting that you asked, because I did not know the weight either, so I took it apart and measured it this morning. It’s about 18S in size, and the case weights roughly around 52 grams (plus weight of the bezel ring, button and crown, but minus the steel springs). I also took...
  6. mynikko

    18K Henry Sandoz 1/4 Chronograph/Repeater Pocket Watch

    Nice watch. I also have a similar one, minute repeater and chronograph, by Henri Sandoz in 18K as well. Although it has a sliding activation for the repeater, its construction is very similar to Le Phare. I found that they actually modified the pushing activation to silding after dissembling it...
  7. mynikko

    Need help decipher this Patek certificate

    Thanks so much for solving the puzzle for me. This watch calibre is identical to the usual Gondolo in construction, so I think it probably has at least 15 jewels. I am not sure how many jewels a Gondolo pocket watch has, but definitely more than 11 (plus roller pin, end stones and two on the...
  8. mynikko

    Need help decipher this Patek certificate

    Hi, I recently acquired a Patek Philippe pocket watch that comes with an original certificate. However, I cannot recognize some of the hand writings. I know I can order an extract from the archive to compare the information of the two, but they just increased the price from 150 to 500 Swiss...
  9. mynikko

    Help What are these mysterious tools/parts?

    (the background green grids are 1 x 1 cm ) Those came with a bunch of vintage watchmaker tools. Apparently those were made by a company called Joseph W. Field. I believe those tools were very likely for pocket watches, because those brass dies are marked with pocket watch sizes (0s, 6s,12s, 18s...
  10. mynikko

    Detent Escapement Wheel Replacement?

    It has been half a year and I am reviving this old thread. I finally made this chronometer to work again. I actually knew what DeweyC was talking about, but I didn’t have the time & energy to work on this chronometer (was working on two repeaters and a Modernista pocket watch). I could just keep...
  11. mynikko

    Detent Escapement Wheel Replacement?

    I probably know what you are talking about now (12), because such constant skipping usually means the arrangement was setup up (incorrectly) that way. However, knowing is one thing; execution is a whole other story.
  12. mynikko

    Detent Escapement Wheel Replacement?

    So what you are saying is that the problem probably has nothing to do with the return spring but the escapement arrangement itself, but you are not telling because you only teach this in person. It's OK. I can understand since you guys owe me nothing and are not obligated to answer any of the...
  13. mynikko

    Detent Escapement Wheel Replacement?

    Hello Graham, (source: Escapement - Wikipedia ) By return spring, you meant part f of the above diagram right? In the above case, the gold spring and return spring are two separate components. However, in my case, my gold spring and return spring are the same spring. It is the same design...
  14. mynikko

    Detent Escapement Wheel Replacement?

    Hello Graham, My habit is that I do not perform irreversible work unless I am absolutely sure what I am doing. I really hate to rescue a watch that the previous worker introduced even more problems. Anyway, back to the topic. My literature tells me that the gold spring tip (the D part)...
  15. mynikko

    Detent Escapement Wheel Replacement?

    OK, I removed the detent and examined whether the every tooth on the escapement wheel can touch the roller stone. Strangely, all the teeth have sufficient length to touch the roller stone. I re-assembled the watch and looked closely again; I found that the locking stone would just keep two teeth...
  16. mynikko

    Detent Escapement Wheel Replacement?

    By removing the balance wheel, I can see the locking stone on the detent can stop every teeth on the wheel (at least when I manually advance the wheel tooth by tooth). The black stain on the escapement wheel is the maker I left to obverse whether a teeth is missed or not (in action). I probably...
  17. mynikko

    What is the name of this device?

    Hi, that is just an example because I cannot show you the part on the one I am working on since its missing. Do you know know if there is a specific term for this type (the blue spring) of mechanism?
  18. mynikko

    Detent Escapement Wheel Replacement?

    Hi, I am currently working on two detent chronometer pocket watches that suffer the same symptom: running too fast. One gains a few minutes in an hour while the other one basically running 2X the speed (i.e. gaining 30 mins in 30 mins). I think the teeth on the escapement wheels are worn that...
  19. mynikko

    What is the name of this device?

    Hi, I am currently working on a Chinese duplex pocket watch, which is missing a device on the mainspring barrel. I assumed it is a type of stop work to prevent over-winding, but is there a specific term for this type of device (please refer to the picture below, the blue metal click pointed by...
  20. mynikko

    Swiss Watch Brands in the mid to late 19th Century

    Thank you all for the suggestions, I will research further into the subject. My intention for asking this was simple: I want to know whether the proclaimed long history from those luxury brands marketing campaigns are true or not. Personally, I only collect antique European pocket watches, so...

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