Smiths Imperial cal 0104 mainspring size ?
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As with many videos: long-winded and waste of time (imo). A polished and slippery tip is less than optimal. I use rectangular Degussit stones (the Seitz one is nearly polishing, takes too much time for my taste) exactly as Nev shows. Frank
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By Neverenoughwatches · Posted
We certainly are a good old bunch, a lot of it could be attributed to the nature of the hobby, apparently a calm and peaceful pastime 😅 taken up in our mature years . -
Well said. I've found if I am searching for answers to a problem I've encountered, many times there's already a thread about that topic with good advice offered. I've thoroughly enjoyed being here, and more than got my money's worth in taking Mark's courses (I wasn't complete beginner but I thought taking a few courses from a trained professional might be worth it - and it certainly was!) and then continuing my growth with the help of this friendly and knowledgeable forum.
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By Neverenoughwatches · Posted
This is what seitz actually provide to do the job. I use a small diamond 2000 plate lap and a 3000 sintered ruby sharpening stone both with the jewelling tool to keep everything perpendicular. -
A stuttering second hand on a 7750 will likely be due to either the depth of engagement of the oscillating pinion with the chronograph wheel being too shallow, and/or the friction spring that prevents backlash and stabilises the movement of the chronograph seconds hand needs adjustment. The friction spring looks a bit like a dog’s bone, and is found in the centre of the movement. Here’s a picture : The spring could be worn, not providing enough tension against the wheel or could be dirty/oily. Hope that helps, Mark
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