I was checking the performance of my Strela chronograph (Poljot 3133) and found an interesting anomaly. By looking at the timing graph, I would say that aside from the watch needing some adjustment, one of the two swings seem to be inconsistent. Am I right in stating that?
I was pretty confident that I will find some obvious problem with the impulse pin, pallet jewel, or escapement. But taking these parts out of the movement and reviewing them under the microscope did not reveal any obvious problem. Nothing seems loose, damaged or bent. I then cleaned the parts and put them back in the movement and as expected got the same anomaly on the graph.
I am very much in the mood to disassemble, clean and oil the whole mechanism but before I go there, I thought it may be a good idea to check with the forum on what is likely causing this behavior. I am attaching some photographs of the parts but they were made with my phone pointed through the eyepiece of the microscope and may not contain enough details.
Guess I should also say that this is the first time I will be fully disassembling a chronograph.
I’d be surprised, but very happy, if anyone has the knowledge to help me out with the following.
I’ve bought a Russian watch having a Poljot 2614.2H movement (Cornavin Dolphin) on eBay which I’m now servicing. My problem is that I need a new mainspring for it (or barrel complete) but I’m unable to find anyone who can supply it.
I found some other Poljot mainsprings on eBay and CousinsUK.com, but non for the 2614.2H. For example, on eBay I’ve found a mainspring for a 2609/2614B, and on CousinsUK.com I’ve found a barrel complete for the 2609. However, I have no idea whether those would be compatible with the 2614.2H or not?!
Here are the measurements of the mainspring I’m looking for:
Length: 330mm (approx.)
Inner Barrel Diameter: 10.48mm
I should also mention that it needs a “DB = Special Bridle” as specified by the Generale Ressorts catalogue on CousinsUK.com, which I’ve also browsed but with no luck. Below are some pictures of the barrel and mainspring I’m looking for.
I have been servicing a Poljot 2612 alarm movement - everything stripped, cleaned and 99% reassembled - however I an really struggling with getting the balance back in. I've now spent 3 separate sessions just trying to get the balance in - but still no success. Very frustrating.
I notice that there are a few references in these forums of people having serviced similar 2612 movements - so I'm wondering whether there is any advice on the best / most successful way to re-install the balance?
Any help/advice would be greatly appreciated.
Since this is a pretty complex ana-digi movement I would only clean it if it is dirty on the inside (which is usually unlikely).
For the most part you're only going to have to clean the inner keyless works where all the metallic non-electric parts are (the ones that turn the hands) and lubricate them. Anything that is electrical just use an air blowing tool and lightly clean them (especially the contacts) with something soft, maybe a soft brush.
You have to take it all apart to reach the area where the gears/wheels are. You'd need some special grease and oil for them. Usually they use quartz watch oil. Can't remember what I used specifically.
Welcome to the forum!
What you're playing with is basically the most sensitive part of the watch.... I think you're better off starting over from scratch, buying cheap movements to practice on, all the tools you needs, and then, try to fix the mess. We're talking at least a few months worth of practice here.
Or you can take it to a pro who will fix it for you, but we're probably talking many 100s of dollars at this point... (a proper cleaning of a working watch would have cost a couple 100s maybe)
It is a nice watch, it's a shame it got all mangled up. If you do decide to take on this hobby, watch all the videos, ask questions, take it slow. In a few months, you'll be very proud to have a working watch again (just make sure you break a few cheap ones first).
I serviced a watch like yours a few months ago. Mine had somewhat similar issues with the seconds hand. I just cleaned the movement, lubricated it and then assembled it back together.
You'll find a few videos made by someone on how to take that movement apart on youtube but they're not very good if you don't have any experience.
If you don't have experience with working on watches and if you don't have the right tools I suggest you take it to a watchmaker or leave it alone until you get more experience (if you're planning on doing this as a hobby or something).