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Post an interesting snapshot of what you are working on. Wether you are a pro photographer, or taking snaps on your phone, it does not matter - we love watch movements and we want to see them and talk about them.
I ask myself this. Why would anyone want to put such an outstanding clock of great quality such as this on ebay. Study the photo of the train and you can see all the wheels have been hand pierced. I’m assuming all photos were taken before a complete overhaul took place as the plates are very stained. It’s a little overpriced.
200s slow per day is not massively slow. That's only three minutes, and probably within the range of the regulator if the hairsping has relatively few coils (since indexing makes a relatively bigger change to the hairspring length).
Bear in mind that often watches run slower once cleaned if they have previously been regulated when not running perfectly. For example, if the hairsping was slightly sticky when regulated previously, it would be regulated slow to compensate for the hairsping vibrating too fast due to stickiness.