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Hello again. 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. Cheers!

Hi, my name is Peter, I'm new to collecting watches. I have found this forum while looking for some instructions how to install stopwatch start/stop lever on 3133 movement. Maybe somebody here will find a moment to help me. I've bought watch with broken off piece of stopwatch start/stop lever. I ve got two replacement parts already but none of them seems to fit. After installation lever is to stiff or too wobbly depends on how tight i screw it on. There is small cut out in movement body, I suspect that one end of lever should fit there and move inside. Unfortunately all my levers (including broken one) are too long... Thank You