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"Automatic adaptor bridle"


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I had read that blog entry. Stellar work by Christian, just looking at that pivot size makes me gulp, and the rest is not for less.

Sorry, can't help with locating the adapter. But if you contact Christian he may tell you, considering the kind guy he is.

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Why would you want to make one when auto m/springs come with them fitted. If you do then extremely strong m/spring is needed, must be the correct height, length is more then the barrel, you know the rest because its how the slip spring works in an auto. The hardest part is the strength and height. 

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If you read the comments at the bottom of link it says he took it off an another automatic  mainspring.

The problem with modern alloy mainsprings is attaching it, it is much easier to rivet or repair an older blue steel type mainspring like watchmakers used to do years ago, but most of these type including new old stock have lost there strength/shape over time and are now useless.

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2 hours ago, oldhippy said:

Why would you want to make one when auto m/springs come with them fitted. If you do then extremely strong m/spring is needed, must be the correct height, length is more then the barrel, you know the rest because its how the slip spring works in an auto. The hardest part is the strength and height. 

It,s when a replacement is not available. At a push you have to fit the nearest size available but this idea is another way (if it works that is)

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    • Those two movements are often referred to as Aegler-Rebberg movements, but other similar movements also carried the Rebberg depose stamps on the dial plate.  The 25.74mm movement I showed photos of above is not either a Nr. 52 or Nr. 53. From the same site “When the term Rebberg Déposé is seen on an Aegler movement, it could refer to the registered trademark or the registered design, but the movement is usually one of the two registered designs shown…” (italics mine). Whilst movements thus stamped usually do match those design drawings, they exist in several sizes and are separate movements in terms of spare parts like the stem the OP is seeking. The first few times I encountered these movements I assumed that being Aegler calibres, I’d be able to easily identify them and therefore search for parts/parts movements if needed. I learned quickly that my assumption was flawed and there are several very similar movements, some of which are very difficult to identify. Unless a seller specifies the size of a parts movement, it is risky to order them on the basis of identical appearance.  In my experience, the older one of these movements is, the harder it is to identify it.  Best Regards, Mark
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    • https://www.britishmuseum.org/collection/term/BIOG81247 Hard to make out the lower left symbol but I think 1829.  Not parts will be available.
    • The video doesn't help me. What lathe are you using and is it true. To be fair to you I don't think I can help certainly not by looking at a video, I need to be their. Have you tried another cutter?  
    • Thats them Trav. I'll have a look now .
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