Chevrolet 1533X2 30-cwt trucks

[motto]

The closest vehicle in the group of three appears to have the standard L/L Chev ten stud wheel pattern. (Presumably ten on the rear and five on the front) Not the 'star' type Blitz hubs.
This is also in line with the WA truck.
The bumper on the nearest truck is of a civilian type unlike the WA truck which has the heavy L/L type.
The furthest truck from the camera is quite different and is running on Blitz type wheels and hubs.
The side mounted fuel tank on the WA truck is the standard tank supplied with L/L Chevs though very few came with them from what I've seen. These tanks were 18 gallon capacity and Hudson Stores in Melbourne had them unassembled. The late Mike Edwards still had some of them.
David