Hi:
I did read that the ink in the caseback of the Aquaracer must be removed, as the gen does not have it. See the picture of the rep caseback:
I checked in two ADs, one in Spain and the other one in Thailand, that the gen has no ink in the caseback.
It is quite easy. Remove the caseback. Put it in a glass with pure acetone during half an hour. Then use a brush and more acetone to remove it. After 10-15 minutes of work, this is the result:
Now it is very hard to distinguish the rep from the gen.