I know, I meant that the individual vehicle represented by my model (i.e the decal markings and paint scheme) is a test vehicle based in the USA in the 1960s.
I believe that the M551 version represented by the Airfix kit is an earlier, pre-Vietnam type anyway, it does not
have the cupola armour shields usually found on Vietnam-based M551s, and there are probably other differences which I
haven't spotted or just don't know about :)