[Mike Cecil]

Hi John,

Nice find.

The Semi-trailer, 7 ton GS (Aust) No.1 had a square front and a heavy-duty oil-well type turntable and a four wheel bogie with 8.25-20 tyres (although the type is also listed with 10.50-18 as well: an alternative or maybe earlier?). It was the same design as used for the specialist semi-trailers, such as the Pontoon, SBG and Boring Plant, but with a plain deck without the specialised fittings.

The other Aust 7 ton semi-trailers were:
No.2: round front, McGrath turntable

No. 2A: square front, McGrath turntable

No.3: round front, McGrath quick-release turntable, fitted with booster brakes.

No.4: square front, Army-design turntable, drop sides.

All the No.2 to No.4 were single axle with dual wheels.

The dolly is a 'Converter, Semi-trailer, 2-wheeled (Aust)' for use with semi-trailers with quick-release turntables.

Tractors were either Ford, Inter, Dodge MC or CMP Ford or Chev.

Mike