Is this actual movement of Omega De Ville Rattrapante

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Dear friends,
I got a question about Omega De Ville 4847.30.31, i found some good bargain on this timepiece and i am like it a lot, but I am not sure about their movement, i search on the internet and found that movement is little different than on this piece, can you please tell me if this movement is original and not something different? Sorry i didn't get any better photos.
Thank you very much
 
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I think the movement (and the watch) starts with the letter "F".
 
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^ ^ ^

....and I'm pretty sure he he doesn't mean 'F' for Frédéric Piguet 😁