After finding this one on an old parish map this week I thought I spotted the trig on Google Earth but could only confirm today. It was easy enough to drive to the end of Walter Road and walk up the hill with the usual "Thou Shalt Not Pass!" signs from Sydney Water. There's lots of tracks here with horse trails everywhere. Just follow the track to the left and it will take you to the trig. The plinth is intact although the plaque was gone. The vanes look like they fell off when the PVC post burnt in a bushfire recently. There's a newish survey mark hatch at the base which may contain the plaque but we didn't have anything to open it to check.
Another nice re-discovery.

Rated: for Overall Experience.