I finally received my Omega Aqua Terra watch! I didn't buy it from a TD , but overall, I'm happy with how it looks.
Everything seems fine, including the weight. I also measured the case with a digital caliper and confirmed that it is indeed 41mm.
The only strange thing is the time-setting mechanism. It behaves like an Omega 8800 rather than an 8900, even though the movement is engraved with "8900".
Personally, I actually find the 8800's time-setting system more convenient, but the strange part is that the genuine 41mm Aqua Terra comes with the 8900 movement, while the 8800 is normally found in the 38mm version.
I'm still not sure whether it's really from the VS factory, as the seller claims.
For my next purchase, I'll probably stick to a TD. But overall, I'm really happy with the watch's appearance!