thanks for the replies.
it is a confusing issue, as I have photos of all different series Ts and they have black valances and inside steps but must be after repaint or under body work.
3rd series Ts (low nose), going by Train Hobby book, appear to have been delivered with Black valances and Steps.
Don't know if anyone can confirm this????
Is this a photo showing a locomotive with a fresh paint, or is it dirty after being in use? I have to say again, I have never seen a VR era diesel locomotive that is wearing a fresh coat of black on the valance, and I doubt they would have been delivered in black.
Take a look at the photos on Mark Bau's web site for a more definitive set of photographs: http://www.victorianrailways.net/motive%20power/lochome.html
The so-called third series T is shown and the earliest shot of one shows it painted in VR blue about 6 years after delivery, so that would suggest the colour scheme was blue.
I would also echo David Peter's comment that the colour reproduction in the Train Hobby books is appalling, never make any judgement on colour from them.