I've just noticed that the photo from the Osprey book in the initial post of this thread disappeared. So I post it again as well as another view of the Rhodesian T16 variant in full colour that I found in another forum I belong to.
As for what you call the M203 it really seems very interesting. R.P. Hunnicutt in his "Bradley. A History of American Fighting and Support Vehicles" says nothing about such a vehicle. He mentions only derivative of the T16 designated T16E2 that had slightly different chassis than the basic version but its armour was the same as in the T16. By the way the "M203" in the photo has the chassis of the standard T16 carrier.
Best regards,
Piotr
