Given that it has now been over a week since I posted the photo, I suppose I should supply the answer.
1321 was located on Pelican Point Rd, Outer Harbor. The driver had stopped there prior to commencing a 150 from the Submarine Corp in order to use the public conveniences that can be seen to the left of the photo. For those that would like to see a map; here is a ready link to Google maps:
https://www.google.com.au/maps/place/34 ... 138.500752Google Maps Street view from the same location at
https://www.google.com.au/maps/place/34 ... 138.500752 shows the public convenience erected and the area being worked on.
As Lt. Commander Data was closest, I hereby announce that he has the option to provide the next "Where Is It" photo