That's a rep of the Las Vegas SE
The seller has several negative reviews of sending fake goods, including watches. He started with no pictures, then added a pic of an unrelated AP movement and then a bad pic of the a watch (that's probably not his because it looks gen). Funny the watch on the pic has box/papers but he claims he doesn't have them.
Think about it. The gen costs around $27K new. He could get easily $5-8K but taking it apart, if it was really for parts. Too good to be true, usually is.
That's probably a sec@12 model that crapped out, hence selling for parts. Considering the rep costs $500, $400 for one with a bad movement is not so bad.