It is possible to 'date' a card and a view of a 'Kodak Austral' stamp box can be particularly useful whereas just a verbal description doesn't provide the 'necessary details'. Not to worry though as the photo is not from a glass negative and as the print is b&w and not sepia, the photo is more likely than not to be from the 1920s/30s. Establishing this is important when checking out the location of roads, houses, jetties, etc. in a 'whereizit' photo.
If you can post an enlargement of this section of the photo ....
- mystery ppc.JPG (20.87 KiB) Viewed 2807 times
..it should assist in 'nailing' the location if it is in Tasmania