Nice little car, I've seen these occasionally but usually missing the wire screen and driver. There's a link on Nick's site below: I'm not sure if this also came in a military set, someone may be able to help:
It is part of the 35 series of dinky cars,as a rough rule vehicles with grey/white wheels are prewar,black rubber would be post war,they tend to suffer from fatigue but are very popular even parts of them.
Heres some i have presently
dave
Definitely pre war as this timeframe only had the wire windscreen frame. Post war didn't have the frame. The damage is also a dead give away for pre war as the initial years metal quality wasn't great with lots of contamination of lead and other factory detritus swept off the floor.