Yes, all of the copies I've seen look rather bad to me, and I don't see anything obviously wrong with this one.
Pictures below.
By the way, I used a couple of relatively weak magnets on the cross and there was not even a hint of attraction, which is consistent with it being silver. The magnets were strong enough to attach to other household metals. I have no powerful rare earth magnets on hand to see if there is any attraction at all, however.
Is that judgment solely based on the fact that many copies have this number, or do you see anything wrong with the cross itself?
Of course, I strongly doubt the authenticity of this cross at this point. However, I'd like to determine its authenticity definitively on the basis of its qualities, if possible. There was at one point a genuine 699933. I recognize the odds are quite low that it's this one, but I'd like to know for sure.