Try to find the spot where the photographer was standing.
This might be a little earlier than "c. 1950". There is a car with a banner saying "National Road Safety Week" (see note). Amazingly, Trove results narrows this down to October 1936 - trove.nla.gov.au/search/category/newspapers?keyword=%22Na...
At 09:01 by the clock! (see note)
Via Trove, a 1933 article about Thomas Playfair Ltd., (see note on the van) - trove.nla.gov.au/newspaper/article/161582593
this is the link to the 1950 Pix article this photo shoot was for nla.gov.au/nla.obj-454314772/view?sectionId=nla.obj-47999...
The date is on the reverse of the photo - x9.10.36
https://www.flickr.com/photos/[email protected] How did you find that ?!
The pale car is a 1935 Ford - https://www.flickr.com/photos/mr38/7152181639/ Challenge: name all the other cars and trucks ...
https://www.flickr.com/photos/beachcomberaustralia Download the photo, then flip it vertically. You can make out the date then along the bottom in white writing
Just wondering if perhaps the T number plates could help with narrowing the date?
The number plate on the "National Road Safety Week" vehicle 183-580, is dated to the 1929 series - en.wikipedia.org/wiki/Vehicle_registration_plates_of_New_...
Several others are 1928-1929, although plates could be issued later than their original start year, depending on stocks held by the local motor registries; but probably not 25 years.
Wouldn't the T plates be taxis? Can't locate a listing though.
The R1 type tram has just turned left, having climbed the William Street hill, departing eastward from the city. The driver has forgotten to change the destination sign!. The tram rails in the foreground are the remnants of the former Darlinghurst Road terminus, clearly having been disconnected from the main line.