The easiest way to pick that this overturned Marmon Herrington Armoured Car is MK III, is the external headlights on each of the front mudguards. They are clearly identifiable on this Marmon Herrington MK III Armoured Car. This is also evident on FE 481 and FE 482. The headlights on the MK II were inside the armoured front doors.
I obtained copies of FE 481 and FE 482 in correspondence with IWM over 20 years ago
Coloured photos of motor transport and LP1 Machine Gun Carriers of The Australian 22nd Brigade on Malaya - Singapore 1941, show the vehicles in an overall deep bronze green colour. The book THE RAILWAY MAN mentions their artillery as being green.
However, the overall green appears to cover an overall single dark colour vehicle. There are colour photos of camouflage pattern R.A. vehicles on wharves in Keppel Harbour. I have no real idea of the camouflaged pattern applied to the overturned Marmon Herrington MK III Armoured Car at Bakri