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Hello all i hope im in the correct section to introduce myself ,my name is Wayne  im 62 and very new to watch repair of any kind ive changed batteries and adjusted straps etc but nothing inside a watch apart from crowns/stems for family members 

,My farther did repairs /hobby for people when i was a young lad i used to watch him and loved seeing all the parts . but my interest soon ended when i dismantled a watch when my dad was at work  just to use the wheels as spinners ,dad wasn't happy and a very sore ear put me off, back then kids got corrected and most learnt right from wrong haha 

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    • Hello and welcome from Leeds, England. 
    • This is the old/first(?) way for making a mainspring for an automatic. "Evolution-wise" it is an logical first step forward from a standard spring. Usually these are indeed replaced with a new spring with an integrated/fixed bridle. Lubrication as you would do with any automatic.
    • I'm working on a Schild AS 1250 (a 'bumper' automatic) and it's the first time I've seen a mainspring like this. It has what looks like a regular manual-wind mainspring with a 'hook' at its outer extremity. On a manual-wind watch that 'hook' would engage with a 'hook' in the barrel wall to prevent it from rotating. However, the AS 1250's mainspring does not engage directly with the barrel but rather with a 'sliding bridle' that sits between the mainspring and the barrel wall, and evidently facilitates the slip necessary in an automatic. I'm not sure what advantage this two-piece configuration provides, but it highlights a gap (one of many) in my horological knowledge. I'm not sure if 'hook' is the correct term as used above, but please see photo below to see what I mean. Therefore, two questions please. 1. What is the proper way to lubricate a barrel from an automatic watch with a sliding bridle? My guess is the same as any automatic ms/barrel (e.g, a few dabs of braking grease on the interior barrel wall). What do the experts say? 2. I purchased a Generale Ressorts GR3472X mainspring, made for the AS 1250. It looks like the bridle is included and I don't need to salvage and re-use the old one. Is this a safe assumption? Thanks for the advice. If you have any other wisdom you'd like to share about separate sliding mainspring bridles, I would be very interested. Cheers!
    • Thank you Hector. You too matey 😊
    • Bless you, Mark. May you live long and prosper!
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