Search the Community

Hi All, I've been working an old, well-used Landeron 48 movement. The chronograph parts aren't installed yet because I'm trying to make sure I'm happy with the performance of the primary timekeeping components before I start layering that stuff onto the bridges. In any event, the watch is running fairly well overall, with around 300 degrees of amplitude and reasonably steady output on the timegrapher, but having done a first quick pass at regulation I've found that the watch wants to run fast and I've had to adjust the regulator to the far reaches of the "slow" range in order to get close to correct timekeeping, as you can see in the photo below. Since this is an older movement the relationship of the regulator and the adjustment arm/indicator is fixed. It may just be my OCD but I'd really like to get the watch to regulate with the adjustment arm+ closer to the center of the range. I've tried loosening the regulator pins, and that helped a bit, but not nearly enough to fully correct the issue. Question: Is there some other technique I should be trying here, or is this just the kind of "old watch stuff" where it's better to shrug and move on? Visually, the hairspring looks great, is concentric and flat, and is pulsing the way you would expect. The beat error is a bit off but not terrible - between 1 and 2ms. Ordinarily I'd let that slide on a watch like this because adjusting it doesn't seem to be worth the risk of repeatedly messing with the balance, but is it possible that's the culprit, or part of it? I could potentially loosen the regulator more, but again I don't want to risk breaking a pin, so it's not something I would attempt without confidence that it's going to make a substantial difference. I can certainly move forward with the watch as is, and the timekeeping performance I can get out of it will be more than acceptable for an ~80 year old watch, but I'd love to tap into the collective wisdom here in case I'm missing something obvious...

Hi all, hope your having a good day! I have finally got back to restoring a Landeron movement, a personal project I started a while back. I believe it is an early cal. 48 although it may be a 47? The balance was one of the many issues with the watch. With a broken pivot on the staff and the balance spring beyond fixing, without buying professional tools finding a complete balance would be the easiest way for me to fix the issue. I am at a complete loss as to what balance I need; I know its a non-incabloc, possibly made by either Barbell or Renata but I'm not sure what I should be looking for, or where to find one. There are many variants and I'm not sure if any of the calibers of Landeron house the same balance that I might be able to utilise? I've attached a picture of the movement before I disassembled if it's to any use? Any help is very much appreciated! Many thanks

I am in the process of servicing the Landeron 48 movement that came with the complete watch with wrong dial applied, as many of you can recall from my other thread. After a brief check I noticed something was wrong with the balace wheel, so after inspection of the part, I discovered that the upper pivot was broken. I had another balance wheel with bent hairspring, so I decided to replace the balance wheel using the original hairpring. After a bit of tinckering, I managed to do just so, but a new problem arised, which will be shown in the linked videos here below. The first video shows how the new balance wheel turns freely after a bit of adjustment in the movement: The second video shows the problem I faced after replacing the hairspring onto the balance wheel and reassembling everything back together. Basically, the amplitude is extremely low, but I cannot figure out still what can be the problem. The second video above shows the issue better than a thousand words... I need the help of the experts, here: what can the issue be? I followed all Mark's videos on putting the watch in beat, checking the pivots, pallet stones, everything. I have never seen such behaviour before. What can it be?