Reading the above, I'm trying to place which variation this is.

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Silver trim

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Shouldered front wheels (hole in base, bumper/chassis brace & chassis/wing brace - body 3?)

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With text on small wheels

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No stoppers on tipper bed

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Chassis brace

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I'm thinking Code 6
Here's one I've had for a while that shows what might have been if they'd included a driver

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Can't quite figure how it was done as the driver's top half of body sits on a piece of what looks like balsa wood which appears too large to fit through any of the windows.
The base rivet is clean and untouched