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Hello dear community! First of all I have to say some thankfull words, because it's really nice to have a place where you can find answers even without asking questions. But time has come. I'm working on Dugena 1008 (ETA 2472) movement and faced with a problem: when the Sweep Second Wheel is installed (no matter a new one [I had some] or an old one [from this exact movement]) it's getting stuck all the train of wheels. Everthing is clean and shines like a diamond. During visial inspection I haven't found any noticable issues: jewels are intact, pivots are okay. At least under 10x magnification. Yeah, I don't have a microscope. I recorded two videos in order to demonstrate and very sorry for its quality, but at least it can illustrate you (I hope) what is happening. Sweep second wheel isn't installed, bridge got tight and wheels are spining freely: Sweep second wheel is install and train doesn't spin at all when bridge is tightly (under first resistance) fixed by screws and starts to spin a bit when screws are untighted: So, I can only thank you in advance.

If you’re like me, taking apart you first ETA calibre 2472 and feeling somewhat intimidated after having removed the case back lid looking down on the automatic works, then you will likely appreciate this post. By the way, except for the oscillating weight itself, the automatic winding device is identical for the following calibres: ETA 2450, ETA 2451, ETA 2452, ETA 2453, ETA 2454, ETA 2472, and ETA 2474. My only other experience of ETA’s automatic winding devices comes from calibre 2824-2. So, looking down on the oscillating weight of the ETA 2472 and not seeing a screw holding it attached to the automatic device framework, made me think the parts had somehow been riveted together and probably were inseparable. Having removed and looked at the back of the automatic device framework I could see that the oscillating weight was indeed attached with a screw or at least something that reminded me of a screw. Its slot was very thin, and it sat in a large jewel! No way I was going to try to remove it without knowing for sure it could be done and how it should be done, especially as this watch wasn’t mine but my brother’s who’d trusted it to me for an overhaul. My first thought then was to try to remove all wheels without touching the oscillating weight. After having looked at the device for a good long while, I realized I wouldn’t be able to remove a single wheel before separating the oscillating weight from the framework. So, I decided to be patient (hardest part of watch repairing), put the parts away for now and research the Internet. I Googled “eta 2472 how to remove oscillating weight”. The first hit was “Untitled - OM-Mechanics”, a PDF document. Well, I wasn’t feeling very optimistic but lo and behold, there it was, in full detail! Anyway, the PDF is pretty poorly scanned, and it isn’t all that easy to read the part numbers, so I decided to make my own picture guide for disassembling the automatic device of this ETA calibre 2472, and that’s what follows next: (Eventually, I’ll publish a complete ETA calibre 2472 service picture walkthrough. If interested, you’ll find a link to it in a future post in this thread.)