The crown is not screw down type, that limits the water resistance to meager 60 meters.
Omega followed the original one (that was the "marching orders" to produce the Trilogy - "Be as much original as possible").
Since I don't wash my hands with any watch on my wrist, even the 2000 meters, this is not a problem to me but it may be to some.
Cheers,
Nilo