I don't see anything wrong with it, Omega 511.0404. $1000 is quite a bit overpriced, last two ebay sales were ~$550 and $800 for one of these in 'near mint' condition.
Quite a few watchmaker marks inside the case, which always makes me afraid, but the movement looks well taken care of. Crown doesn't look like the right one perhaps, but I don't know enough to say definitively.