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    • I was going to say, I have a couple of 1970s HMT (Citizen) movements marked for LH threads.   There are a number of co-operations between the French watch making industry and the USSR industry. For example -> http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&&2uswk&Zvezda https://en.wikipedia.org/wiki/Slava_watches Also worth a look is the Lorsa 8FA on 17jewels.info https://17jewels.info/movements/l/lorsa/ https://17jewels.info/movements/l/lorsa/lorsa-8fa/   So the most likely candidate is a Lorsa 8FA derivative, followed by perhaps one of the USSR era licensed copies of a similar French movement derivative.  Well worth the not very much you paid for them, even of only for the history lesson . I think they are going to clean up very nicely though. 
    • Can someone here who actually uses a 4-jaw on a watchmakers lathe for case finishing comment on its use, as per the original poster’s query? There’s no point in speculating about them. I strongly suspect not everyone here discussing them even owns a watchmaker’s 4-jaw   Here’s my experience:  I have a 3-jaw and have only used it for circular brushing and polishing of bezels and case backs. It works perfectly well for that application and is sufficiently concentric. 
    • Yes, a floating barrel or “suspended barrel”.    In the UK, the Geneva stopworks are regularly removed. Some watchmakers decided they were better without. For an excellent description of why they were implemented, David Boettcher’s website is excellent.    https://www.vintagewatchstraps.com/blogstopwork.php
    • Here is another for the grotesque museumIt is not French its Chinese.  https://www.ebay.co.uk/itm/Miniature-French-Gilded-Bronze-8-Day-Carriage-Clock/124200926311?hash=item1ceaf3bc67:g:dlgAAOSwjZZezUkx   I have had the privilege of restoring a James McCabe carriage clock with silver dial and a very large platform strike repeater in a Bronze case with its original wooden and Bronze cornered carrying case that was back in the early 80’s at which point I valued it at 10,000.      
    • I’d just like to add that what WW says is very relevant to this forum. Opinions do differ sometimes, and it can be hard to know sometimes what is best based on other opinions alone. In reality, you have to let experience decide for you in the long term. It may also be that your practical “style” defines how you work.     
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