The 3rd stamp is a NSW 2d De La Rue. Nice rays type cancel leaving most of the stamp clear. Impossible to say what the full number is but it will be something 42 by the look of the ink.
Your title indicates these had unusual watermarks but your pictures just show the cancellations on the stamp. Just want to make sure you're using the right terms. The marks you show on the front of the stamps are cancellations while a watermark would be viewed on the back of the stamp with watermark detecting fluid.
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